Security—for the information on your smart phone, as well as for the phone itself—is a hot topic these days.The truth is that you're packing a lot of sensitive information on your phone, and you should keep it safe.

    When it comes to physical security, iPhone users would do well to download Find My iPhone, a free app from Apple that allows you to visit a website and see your (lost, stolen or misplaced) phone on the map.You can then sound an alarm, send a message that will pop up on its screen, lock the phone or erase all your data.

    Android does not have an exact equivalent(等价物), but there are plenty of alternatives. A free app called Lookout offers the find­my­phone feature.The paid version allows you to wipe the data from your phone remotely.

    Then there is your coffee shop's Wi­Fi network.Anyone with minimal technical expert skill can snoop on(窥视) people using shared wireless networks, harvesting passwords and other personal data. Lookout will caution you when you've logged on to an insecure network, but cannot protect you once you're there.

    In order to protect yourself on such networks, you can use a virtual private network, or VPN. This turns all your activity into nonsense to anyone trying to read along with you from across Starbucks. It also keeps websites from tracking you and, if you're travelling, allows you to get access to sites that may be blocked in other countries.

    If you have an iPhone, the simplest VPN app is probably Hotspot Shield, whose distinguishing feature is said to be that it automatically kicks in each time you start browsing (浏览), as opposed to other VPN apps that require you to start them up manually(手动地)．This matters, because even if you decide you want a VPN app, you want to spend approximately zero time thinking about it. For the most part, that was true of Hotspot Shield, though occasionally it took a while to connect or temporarily lost connection without warning. I found myself having to turn the app on and off sometimes, which involved setting my phone constantly.

    If even reading about the settings on your phone drive you crazy, then it is probably best to stay away from a VPN app. But if you're the type who can't resist checking your bank balance from your corner bar, the hassle(麻烦) may be preferable to the risk.

    People with an impulsive personality refer to those who tend to do things without considering the possible dangers or problems first. According to a new study by researchers at the University of Georgia, such people may be more likely to have food addiction. The study found that people exhibiting impulsive behavior weren't necessarily overweight, but impulsiveness was related to a direct relationship with food, and therefore, less healthy weight.

    Food addiction has been compared to addictive drug use. Studies have linked the dopamine (多巴胺) release that occurs after tasting delicious food to the dopamine release that happens when people consume other addictive substances.

    Impulsive behavior involves several personality traits (特点). Two of these traits, known as negative urgency and lack of perseverance, were particularly associated with food addiction and high BMI (身体质量指数) during the study.

    Negative urgency is characterized by the tendency to behave impulsively when experiencing negative emotions. Some people might drink alcohol or take drugs. For others, it could mean eating to feel better. Lack of perseverance is when a person has a hard time finishing hard or boring tasks. People with a lack of perseverance might have difficulty attempting to change addictive eating behavior, which could also cause obesity.

    “Impulsiveness might be one reason why some people eat in an addictive way despite motivation to lose weight,” said Dr. Ashley Gearhardt, a clinical psychologist. He was involved in developing the Yale Food Addiction Scale in aid of those people. “We are theorizing that if food addiction is really a thing, then our measure, the Yale Food Addiction Scale, should be related to helping control impulsive action,” said Gearhardt.

    Clinical psychologist Dr. James MacKillop, whose lab was conducting the study, believes that therapies used to treat addictive drug behavior could help people who suffer from addictive eating habits.

    “Most of the programs for weight loss at this point focus on the most obvious things, which are clearly diet and exercise,” MacKillop said. “It seems that managing strong desires to eat would naturally fit in with the skills a person would need to eat healthily.”

    When you are travelling in Thailand, which means of transport is the best choice?

    You can rent a variety of motorbikes or bikes in Thailand. It seems to be very popular in most of the beaches and islands along the places in the north. The most popular bikes are the little 125 cc Honda Dream which you can get for about 150 baht (铢) a day or as little as 3,000 baht per month, making it the cheapest way to tour Thailand for the people from other countries.

    Sometimes you will have to go somewhere by taxi. When you are in cities in Thailand, especially in Bangkok, always remember to get a taxi that is traveling on the roads. Some drivers outside hotels refuse to use the meter(计程表). They will ask a price which is several times the price when they use the meter!

    The quality of the roads in Thailand is generally pretty good, so renting cars is another way to get around. The big car rental companies may offer you slightly older cars at a very reasonable(合理的) price. It is a little surprising considering that the cost of buying a car in Thailand is more than that in the West. Petrol is also reasonably priced in Thailand, more expensive than American prices, but much cheaper than what is paid in Europe. In the past, Bangkok could be a difficult place to drive in—signs were generally in Thai only, making it a hard job to find exactly where you were by looking around. But now, the situation is improved. In a lot of places, even the farthest corners of the country, street signs are in both Thai and English.

    Reader: For six years, I've run an office that has two employees: me and my boss. He used to be so appreciative that I didn't mind doing a little extra, but about two months ago, he started being rude and demanding. Now he even yells when I don't have time to bring his favorite wine to his home after work.

    This change started when we met a wealthy new customer, who is a huge jerk (古怪的人) — my boss's new behavior is just like his.

    My boss is a good man; he and his family have treated me like a little sister. Is there a good way to discuss this with him?

    Karla: Sounds like your new customer has set a bad example to your boss. You need to remind your boss that you're in his corner— but you're not his slave. My suggestions are as follows.

Start with a simple question in a calm moment: "Is everything okay?"

State the truth: "Until recently, I've felt like a valued teammate. But our relationship has become tense. Your expectations of me seem to have changed. Although I used to do occasional personal businesses for you as a favor, now it seems expected."

Draw your lines: "If you think my job description needs to change or my performance is not good enough, let's discuss that. Otherwise, I need you to stop yelling at me and to respect my personal time."

Ideally, you'll get an apology and a promise to do better. After that, it's a matter of reinforcement (加强) . If he starts yelling, look at him with a calm expression. After he cools down, restate his request and add, "Is that correct?" For the unreasonable request, such as fetching his favorite wine after work: "I'm afraid I can't take care of that for you." If he keeps acting like a jerk, there are bosses out there who will better respect your time and talent.

    Karla L. Miller is ready to hear your work dramas. Send your questions to wpmagazine@washpost.com.

    Charles Dickens' joy at first arriving in Boston Harbor in 1842 reads like Ebenezer Scrooge's awakening on Christmas morning. Biographer Peter Ackroyd reports that he flew up the steps of the Tremont House Hotel, sprang into the hall and greeted a curious crowd with a bright "Here we are!" He took to the streets that twinkling midnight in his shaggy fur coat, shouting out the names on shop signs, pulling bell-handles of doors as he passed—excited with laughter—and even screamed with (one imagines) astonishment and delight at the sight of the old South Church. He had set at last upon the shores of "the Republic of my imagination."

    Though not quite 30, Dickens was a literary rock star, the most famous writer in the world, who landed like a conquering hero in a country swept up in an extreme "Boz-o-mania". He wrote to his best friend, John Forster, that he didn't know how to describe "the crowds that pour in and out the whole day; of the people that line the streets when I went out; of the cheering when I went to the theatre; letters of congratulations, welcomes of all kinds, balls, dinners, assemblies without end." When Bostonians renamed their city "Boz-town", New Yorkers determined to "outdollar…and outshine them". Their great Boz Ball boasted flags, flowers, a huge portrait of the author with a bald eagle overhead, 22 tableaux (场景) from the great author's works. "If I should live to grow old," Dickens said, "the scenes of this and other evenings will shine as brightly to my dull eyes 50 years hence as now." ①

    The Spirit of the Times wrote of it: "This most extraordinary, fashionable, brilliant, unique, eye-dazzling, heart-delighting, superb, foolish and ridiculous celebration…came off at the Park Theatre, New York, on Monday evening." But, the reporter predicted, "Such were silly-minded Americans, and such the ridiculous respect paid to a foreigner, who will probably return home and write a book abusing the whole nation for the excesses of a few fools." ②

    In fact, Dickens wrote two.

    ③ Apart from the country's great writers, he found Americans ill-mannered and invading his privacy. "I am so surrounded by people that I am exhausted from want of air." Dickens complained to Forster. "I go to church for quiet, and there is a violent rush to the neighborhood of the bench I sit in. I take my seat in a railroad car, and the very conductor won't leave me alone. I can't drink a glass of water without having a hundred people looking down my throat."

    ④ He disliked Americans' table manners and the tobacco spit everywhere he looked—on even the sidewalks of the nation's capital, where he found party politics corrupting everything, its leaders "the lice (虱子) of God's creation," and "despicable (卑鄙的) trickery at elections."

    Even worse, everyone wanted a piece of the action, from Tiffany's selling unauthorized copies of his bust (半身像) , to a barber selling locks of his hair. "I never knew what it was to feel disgust and contempt (蔑视)," Dickens said, "till I traveled in America." When he departed in June, he left behind all notions of an Arcadian realm he now regarded as "a vast counting house" full of nothing but "cheaters and bores." (See: A Christmas Carol.)

    Americans had soured on him, too. Dickens never missed an opportunity to accuse American publishers of openly pirating his novels to sell for mere pennies, with no recompense to the author at all. The press took offense. Within a month of his arrival, Dickens were laughed at for his "foppish" clothing and effeminate hair, described as "no gentleman," "a contemptible Cockney (伦敦佬)."

    If you cannot afford to travel in any class above economy, flying generally sucks, either a little or a lot, depending on your tolerance level. But it especially sucks if you are too wide for the airline's design.

    Just getting to your seat can be a challenge, as your hips (臀部，髋) bounce from seat to seat on each side of the aisle (过道). If someone is standing up to put things in the overhead locker, there is a decision to be made about whether it's worth trying to squeeze past. Everything is just slightly too small: the seats, the overhead lockers, even the bathrooms—and those, it seems, are getting even smaller.

    The Washington Post recently reported that, on some newer planes flown by American, Delta and United airlines, the bathrooms in economy class are just 61cm wide: about 25cm narrower than the average portable toilet, and roughly the width of the average dishwasher. Your face might be the only thing you can poke in there comfortably—which makes it a poor design, considering what a passenger is likely to need the bathroom for.

    According to the manufacturer, these "Advanced Spacewell" bathrooms make space for six additional passengers, which is great for the airlines' financial bottom line. But what about the other bottom line? Concerning, well, bottoms that can't fit into their planes' bathrooms?

    As bodies get bigger and aeroplane spaces get smaller, the wide among us have come up with solutions. Armrests that turn us into sausages (香肠) can be pulled up, or slowly encased (围住，包起) into the soft flesh of our sides until we go numb (麻木). We can ask the flight attendant to get us a seat-belt extender, if security has confiscated the one we brought with us, as can sometimes happen. But squeezing into a tiny toilet and closing the door behind us? Not workable.

    Unlike the impossible task of squeezing down the aisle to your seat, or the side-to-side dance necessary to get big hips past the armrests, fitting into a space just 61cm wide is not just a challenge—it is almost impossible. It is not like missing out on an option for the in-flight meal—a bathroom is as essential as a safety-compliant seat belt, or the air that is pumped in to the cabin (飞机舱). If airlines are not willing to make space for us, bigger passengers may have no option but to reconsider booking a flight at all.