“Is there anything else you need, honey？” my dad asked  me as he put three twenty­dollar bills in my hand. I was traveling  back home from a family visit, and after treating me to breakfast  and filling my car with gas, it was obvious that my dad wanted  to make sure that I would be okay on the road.

    “No, Dad. You've done so much already. Thank you！” I was overwhelmed once again by his kind acts of providing  everything I needed, despite the fact I just turned 40. Yet I realize that in my father's eyes, I will always be his little girl. He takes deep pleasure in knowing his children are all right.  Now that he has enough money, he loves to give whenever he  sees a need.

    But this was not always the case.  Divorced from my mother when I was 11, my dad couldn't be around his kids as  often as he would have liked. Money was also tight; even weekend visits were rare. However, my dad stayed in constant  communication with us and made sure he was involved in our lives. Though he couldn't always be there in person, I knew  he was only a phone call away. I could always count on that.

    Even now, almost 30 years later, I treasure knowing that I can pick up the phone and call Dad, and he'll be there for me. I have a wonderful husband, but that hasn't changed how   Dad sees me. I'm still his child and he loves to see that my   needs are met.

    I remember a time when I was shopping in a hardware store(五金店)with Dad. I mentioned my plans to paint one wall in my house. Well, that's all it took for Dad to take   action. By the time I got to the checkout(结账) line, all the supplies I picked out were put out of my hands and placed with things he bought.

    Then there was the time when I took him with me to do some grocery shopping for just a few “ items”. By the time we  were finished, my shopping cart was full of groceries from  every shelf in the store! My sister and I joke that if you don't want Dad to buy it for you, avoid even mentioning you want something.

    A bite from a tsetse fly (采采蝇) is an extremely unpleasant experience. It is not like a mosquito, which can put its thin mouthpart directly into your blood, often without you noticing. In contrast, the tsetse fly's mouth has tiny saws on it that saw into your skin on its way to suck out your blood.

    To make matters worse, several species of tsetse fly can transmit diseases. One of the most dangerous is a parasite that causes ＂sleeping sickness＂, or ＂human African trypanosomiasis＂to give it its official name. Without treatment, an infection is usually fatal.

    Like so many tropical diseases, sleeping sickness has often been neglected by medical researchers. However, researchers have long endeavored to understand how it avoids our bodies' defence mechanisms. Some of their insights could now help us eliminate sleeping sickness altogether.

    There are two closely-related single-celled parasites that cause this deathly sleep: Trypanosoma brucei rhodesiense and T. b. gambiense. The latter is far more common: it is responsible for up to 95% of cases, mostly in western Africa. It takes several years to kill a person, while T. brucei rhodesiense can cause death within months. There are still other forms that infect livestock.

    After the initial bite, sleeping sickness symptoms often start with a fever, headaches and aching muscles. As the illness goes on, those infected become increasingly tired, which is where it gets its name. Personality changes, severe confusion and poor coordination can also happen.

    While medication does help, some treatments are toxic and can themselves be deadly, especially if they are given after the disease has reached the brain.

    It is worth noting that sleeping sickness is no longer as deadly as it once was. In the early 20th Century several hundred thousand people were infected each year. By the 1960s the disease was considered ＂under control＂ and had reached very low numbers, making its spread more difficult. But in the 1970s there was another major epidemic, which took 20 years to control.

    Since then, better screening programmes and earlier interventions have reduced the number of cases dramatically. In 2009 there were fewer than 10,000 cases for the first time since records began, and in 2015 this figure dropped to fewer than 3,000, according to the latest figures from the World Health Organisation. The WHO hopes the disease will be completely eliminated by 2020.

    While this decline looks positive, there may be many more cases that go unreported in rural Africa. To eliminate the disease completely, infections have to be closely monitored.

    More problematically, a series of new studies have shown that the parasite is more complicated than previously believed.

    Sleeping sickness has always been considered —— and diagnosed —— as a blood disease, because T. brucei parasites can readily be detected in the blood of its victims.

    The world has lost one of its brightest stars. British physicist Stephen dies on March 14, at the age of 76.

    Hawking is probably the world's most famous scientists after Albert Einstein. He is an expert on black holes. He has devoted his whole life to digging into the beginning (and the end) of the universe. “My goal is simple,” Hawking once said. “It is to completely understand the universe, why it is as it is and why it is there at all.”

    Hawking's achievements are even greater if you think about his disability. When he was 21, Hawking caught a bad illness that slowly stopped him form moving or talking. For a period of time, he had no way to communicate except by blinking（眨眼）. Later he sat on a wheelchair with a computer by his side. To communicate, he moved two fingers to control the computer's mouse. He selected his words from the screen, which were then spoken by a voice synthesizer（音响合成器）.

    “I have had the disease for most of my life,” Hawking once said. “Yet it has not stopped me from being successful at my work.”

    Though Hawking was a disabled man, he made great achievements. He received many awards and prizes for his work during his lifetime. This included winning the Albert Einstein Award, which stands for the highest achievement in theoretical physics.

    Despite the fact that he's no longer with us, his legacy will surely live on. As Sajid Javid, a UK government minister, put it, “A brief history on Earth; an eternity in the stars.”

    Sydney has a huge bus system(系统). No buses accept cash, and a ticket needs to be bought ahead of time. The buses often run at busy hours and regularly(有规律地) during the day. The Sydney Explorer bus provides air-conditioned service and stops at 27 tourist attractions. Its partner, the Bondi Explorer, stops at 19 attractions. Tickets allow holders to jump on and off as they please, and they are valid(有效的) for one or two days. It's an easy way to see the city and the surroundings.

    Sydney's train service runs throughout the central city area and the surroundings. Tickets can be bought from machines that operate 24 hours a day or from ticket offices. The monorail(单轨铁路) travels through central Sydney. It is the most excellent way to gain a good view of the whole city. The monorail runs every three to five minutes, and it takes 15 minutes to complete its journey.

    Sydney is built around a harbor, and the Parramatta River has a large ferry（渡轮）system. It serves the area around the harbor. These include Taronga Zoo, Darling Harbor, Rose Bay, the North Shore, Cockatoo Island and Sydney Olympic Park. The ferries have operated for more than 135 years and 14 million passengers take the ferries each year.

    Water taxis can transport passengers to specific locations(地点), and offer guided tours of waterways. They also offer special services that some visitors may enjoy. The tickets sell for 20 AUD (Australian dollars)for a day or 57 AUD for a week. It is strange, isn't it?

    We've all fantasized about it—after a rough day at work, stuck in traffic with commuters (上下班的人) we'd rather not have in our personal space, and bills to pay, plus the sound of the crying baby in the apartment next door. How nice would it be to go solo and live on an island of one, population: me?

    Well, this is the reality for 84 year old Elsie Eiler of Monowi, Nebraska. She is the sole resident of her hometown, which is the smallest recognized locality in the United States.

    Looking back at the 2000 census (人口普查), the town used to have another resident: Elsie's husband Rudy. Since he died in 2004, Elsie has lived in the town by herself. She considers herself to be the mayor, treasurer, and town librarian. Her main source of income is the bar that is frequented by truckers and other people passing through—the Monowi Tavern, which she founded with her late husband back in 1971 . She received a lot of public attention after it was discovered that she was the sole resident of Monowi, and in an interview she stated that many visitors from around the world have come to meet her in Monowi.

    When asked if she ever gets lonely, she said "I know I could always move closer to my children or stay with them whenever I want, but then I'd have to make all new friends again. Hopefully I will be able to stay here. It's where I want to be."

    Sagrada Familia (2, 056, 448 visits /year)

    Opening hours: 09: 00-18: 00 (October-March)    09: 00-20: 00 (April-September).

    Admission: $11, or $10 with the Barcelona Card.

    Disabled access: Yes.

    The temple has been under construction since 1882 and they've still got another 30 to 80 years to go before it will be finished. The project's vast scale (规模) and its special design have made it one of Barcelona's top tourist attractions for many years.

    La Pedrera (1, 133, 220 visits /year)

    Opening hours: 09: 00-18: 30 (November-February)    09: 00-20: 00 (March-October)

    Admission: $9.50. Save 20% with the Barcelona Card.

    Disabled access: No.

    This building used to be called Casa Mila, but nowadays it's more commonly known as La Pedrera. It was made of bricks and had colorful tiles (瓷砖).

    Barcelona FC Museum (1, 032, 763 visits /year)

    Opening hours: 6th April-4th October: (Monday to Saturday) 10: 00-20: 00; the rest of the year: 10: 00 to 18: 30.

    Admission: $8.50 for entry to museum and an extra $17 for a guided tour.

    Disabled access: Yes.

    It is now generally considered as the best football museum in the world. You can see so many trophies (奖杯), pictures and statues of great football players. I'm not a football fan but I still enjoyed walking round this museum.

    Miró Museum (518, 869 visits /year)

    Opening hours: Check website for details as they vary depending on the time of the year.

    Admission: $8. Save 20% with the Barcelona Card.

    Disabled access: Yes.

    This museum has a wide range of Miró's works dating back as far as 1914. This artwork collection includes not only his paintings but also a good selection of sculptures.