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    When someone reads the right book at the right time in his life, it can have a profound effect. Such is the case for the people on this list, who come from all walks of life. These people have singled out a book that they read which had a life-changing effect on them. They, in turn, affected the worlds of science, technology and politics.

1). That Printer Of Udell's—Ronald Reagan

    One book that had a big effect on former President Ronald Reagan as a child was the Christian-book That Printer of Udell's, by Harold Bell Wright. The main character of the book, Dick Falkner, was born into a broken home with an alcoholic father. After losing both of his parents, Falkner moves to a bigger city, called Boyd City to make a living. However, everyone turns Dick down for a job, except for a printer. At the end of the book, Dick heads to Washington, D. C, to become a politician. It's said that the book showed him that good could defeat evil and that the good guys followed a code of morality, which can be seen as a driving factor in his presidency.

2). A Treatise Of Human Nature—Albert Einstein

    Albert Einstein was one of the greatest minds of all time. His name is synonymous with brilliance. So, what book had the biggest effect on such an important mind? It was A Treatise of Human Nature, by David Hume, which was published in 1738. Hume was a Scottish philosopher known for his contributions to philosophical skepticism(怀疑论). Einstein mentioned a few times that A Treatise of Human Nature had a large influence on him. He read the book just before coming up with his famous special relativity theory. In a letter, Einstein said that Treatise helped him formulate the ideas. It was like he already had the ideas in his brain, and Hume helped him to express them clearly.

3). The Aeneid—Mark Zuckerberg

    When Mark Zuckerberg first added his likes to his Facebook profile, he put the book Ender's Game, by Orson Scott Card, as a favorite book. Later, in an interview with The New Yorker, Zuckerberg clarified that the sci-fi classic was one he enjoyed, but it wasn't his favorite. He said that his favorite book is The Aeneid, by Virgil, a Latin epic poem that was written somewhere between 29 - 19 BC about a group of Trojan survivors. Zuckerberg said he first read the book when he was in high school while he was studying Latin and that one thing that stuck with him was Aeneas's drive to follow his fate to build a city that “knows no boundaries in time and greatness".

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    Last summer, as part of my high school graduation project, I volunteered at Saunders House nursing home .I choose this experience because it was something that I had never done before and I wanted to lend a helping hand．At first it was challenging because I was extremely shy. My goal in volunteering was to bring a smile to the residents（住客） by doing different activities from word games to playing chess. I feel as if I had accomplished that goal.

    At the nursing home, I did a lot of different activities with the residents ranging from Jeopardy to Wheel of Fortune. One of my favorites was a word game where I would write a ten -letter word on the board and the residents would try to come up with as many smaller words as possible. I could tell that it was one of their favorite games because they always seemed to be so enthusiastic when they played．I also transported residents to and from their rooms when they needed help; and whenever it was a nice day out, I would take them outside to get some fresh air and relax. On Saturday mornings, I would deliver the newspaper to the residents and on Sundays, I assisted with morning church services.

    The most unforgettable part of this experience was when I had one-on-one conversations with the residents. It was incredible how many great stories they had to tell. Their stories were so interesting and the experience was unforgettable for me .

    It is reported that conservation groups in North America have been arguing about the benefits and dangers of wolves. Some groups believe wolves should be killed. Other people believe wolves must be protected so that they will not disappear from the wilderness(荒野).

For Killing Wolves

    In Alaska，the wolf almost disappeared a few years ago，because hunters were killing hundreds of them for sport. However, 1aws were established to protect the wolves from sportsmen and people who catch the animals for their fur．So the wolf population has greatly increased. Now there are so many wolves that they are destroying their own food supply.

    A wolf naturally eats animals in the deer family. People in the wilderness also hunt deer for food. Many of the animals have been destroyed by the very cold winters recently and by changes in the wilderness plant life．When the deer can't find enough food，they die.

    If the wolves continue to kill large numbers of deer, their prey(猎物) will disappear some day. And the wolves will, too. So we must change the cycle of life in the wilderness to balance the ecology. If we killed more wolves, we would save them and their prey from dying out. We'd also save some farm animals.

    In another northern state, wolves attack cows and chickens for food. Farmers want the government to send biologists to study the problem. They believe it necessary to kill wolves in some areas and to protect them in places where there is a small wolf population．

Against Killing Wolves

    If you had lived long ago，you would have heard many different stories about the dangerous wolf．According to most stories，hungry wolves often kill people for food．Even today，the stories of the “big bad wolf” will not disappear．

    But the fact is wolves are afraid of people, and they seldom travel in areas where there is a human smell．When wolves eat other animals，they usually kill the very young, or the sick and injured. The strongest survive. No kind of animal would have survived through the centuries if the weak members had lived. And has always been a law of nature.

    Although some people say it is good sense to kill wolves，we say it is nonsense! Researchers have found wolves and their prey living in balance．The wolves keep the deer population from becoming too large, and that keeps a balance in the wilderness plant life.

    The real problem is that the areas where wolves can live are being used by people. Even if wilderness land is not used directly for human needs, the wolves can't always find enough food. So they travel to the nearest source, which is often a farm. Then there is danger. The “big bad wolf” has arrived! And everyone knows what happens next.

    I've personally traveled through many countries that have had U.S. government warnings issued for them, and I've been perfectly safe. Specifically, in the last year, I have travelled safely to both the Philippines and Mexico, and traveled to many South Pacific islands during the tropical cyclone (热带气旋) season and only experienced two days of light rain in six months! This is, of course, anecdotal, so it's important that you do your research before booking your trip.

    One thing I recommend doing is checking for recent posts on travel forums (论坛), such as Lonely Planet's Thorntree, to see what people are saying about the country you'll visit in terms of safety. The U.S. government may make out that an entire country is extremely unsafe when in reality, it's a small part of it that tourists will be unlikely to visit. Read the travel warnings, too, to see which parts of the country the government recommends that you avoid.

    Additionally, it's worth speaking to your travel insurance provider before you leave to check that you'll be covered during your travels to these countries. Some insurance .companies won't cover you if there's a severe warning for the country, but some will. Travel insurance is a necessity, so it's definitely something to check out before you leave.

    Keep in mind that the U.S. government will help you with emergency evacuation (撤离) from a troubled country, but it comes in the form of a repatriation (归国) loan via the Office of American Citizens Services and Crisis Management (ACS), which can be called to rescue you from a bad situation abroad. Remember by heart that you'll have to wait overseas for the money to arrive and eventually repay the loan once you're home safely. Just another reason to get travel insurance!

    Spending money on time-saving services reduces stress and boosts(增进）happiness according to a new research, but shockingly, few of us do it.

    Whillans, a professor at HBS said, "Buying time helps to protect us from the stress in our lives caused by time pressure, and the feeling that we don't have enough minutes in the day to complete our tasks."

    The effect was clearest in the Canadian experiment, in which 60 working adults were given $40 to spend in two different ways. One weekend, they were told to spend the money on a material purchase—a gift for themselves. The next weekend, they were instructed to spend the $40 on anything that saved them time,  from paying the neighbor ' s kid to run errands (跑腿）to taking an Uber instead of a bus.

    "On the day they made the time-saving purchase, they felt happier, in a better mood, and lower feelings of time stress than on the day they bought a material purchase, " said Whillans.

    The biggest surprise to the researchers was how few people would spend money on time-saving services. When they asked 98 working adults how they would spend a "windfall"(意外之财) of $40, only two percent named a purchase that would save them time.

    "One reason," said Whillans, "is that we're very bad at remembering how much we hate doing certain tasks once the suffering has passed. That makes us less likely to take active steps to avoid that overburdened feeling in the future. "But another possible cause is good old-fashioned guilt." If you feel guilty about getting someone to clean your house for you, then you might get less happiness from outsourcing (外包）that task, " said Whillans, "or you might just be less likely to spend your money in that way."

    A new study by Chinese researchers has found differences in the brain activity of men and women addicted(上瘾的)to Internet gaming.

    The study says addicted men have lower impulse control compared with women, indicating that men are more likely to become addicted to internet gaming.

    Researchers from Renji Hospital, which is connected with Shanghai Jiaotong University, recruited 105 Chinese participants for the study, which had two groups - one with 32 men and 23 women addicted to gaming, and the other with 30 men and 22 women who were not addicted.

    They completed a questionnaire for gaming addiction, and reported their gaming history and number of hours playing per week. Researchers also talked with their families to collect the information.

    Through FMRI (磁共振扫描), researchers found that men addicted to gaming had lower brain activity in the brain region associated with impulse control, than nonaddicted men. The lower the activity levels, the poorer the impulse control. Addicted women, however, showed no differences compared with the healthy female group.

    Researchers also studied the functional connectivity between brain regions, which were lower in men with addiction than in nonaddicted men, but showed no differences in the female groups.

    Although there are some limitations, the findings suggest that activity levels displayed in the brain region could be biomarkers to evaluate the behavioral inhibitions of gaming-addicted men, they said.

    Gaming disorder was listed as a mental disorder by the World Health Organization earlier this year. People with the disorder have impaired control over gaming and give it increased priority in their lives－to the extent that gaming takes precedence over other life interests and daily activities.