In ancient Egypt, a shopkeeper discovered that he could attract customers to his shop simply by making changes to its environment. Modern businesses have been following his lead,with more tactics（策略）.

One tactic involves where to display the goods. Foe example, stores place fruits and vegetables in the first section. They know that customers who buy the healthy food first will feel happy so that they will buy more junk food（垃圾食品）later in their trip. In department stores, section is generally next to the women's cosmetics(化妆品) section：while the shop assistant is going back to find the right size shoe, bored customers are likely to wander over cosmetics they might want to try later.

Besides, businesses seek to appeal to customers' senses. Stores notice that the smell of baked goods encourages shopping, they make their own bread each morning and then fan the bread smell into the store throughout the day. Music sells goods, too. Researchers in Britain found that when French music was played, sales of French wine went up.

           When it comes to the selling of houses, businesses also use highly rewarding tactics. They find that customers make decision in the first few second upon walking in the door, and turn it into a business opportunity. A California builder designed the structure of its houses smartly. When entering the house, the customer would see the Pacific Ocean through the windows, and then the poll through an open stairway leading to the lower level. The instant view of water on both levels helped sell these $10 million houses.

    People from all over the world visit Disneyland to have fun, not to get sick. But last week， an outbreak of measles（麻疹）spread from the Southern California theme park. As of Monday, January 19, at least 52 people have got the easily spread illness.

    The majority of the reported cases of measles are from people who visited the park before. According to the California Department of Public Health, these people were exposed to the illness at Disneyland from December 17-20.

    Officials believe the cause is likely someone who caught measles abroad and visited Disneyland, but this has yet to be proved. However, in 2014, California had its highest measles infection rate in nearly twenty years. There were 66 cases of measles reported in the state―23 of them in Orange County, where Disneyland is located.

    Measles spreads very easily. It can be caught from coughing and sneezing. Crowded areas like theme parks are especially suitable for its spread.

    The illness starts with a fever and develops into symptoms including a cough， runny nose, red eyes and so on. About three out of ten people infected with measles will develop another health problem, including an ear infection or pneumonia(肺炎).

    The best way to guard against measles is to get vaccinated(打疫苗). An unvaccinated person is 35 times more likely to catch measles than someone who received a vaccination.

    Mrs Mullen had just got a new heart. She'd waited a year for it, she told me— not that she was complaining. In fact, Mrs Mullen never complain about anything. She just got on with it. Although she was getting over a serious operation, she didn't even like to bother the nurses for a painkiller. She put me, and most of my patients in the hospital, to shame.

    My generation are a generation of complainers. We think the world owes us something. But if the world owes anyone anything, it owes people like Mrs Mullen. She left school at 14, even though she'd won a place at grammar school. She worked in a factory until she retired. She never had a day off sick in her life and never had a holiday — not even when she gave birth to her three children. That's nearly 50 years of hard work. I've never worked as hard as Mrs Mullen, and I'll almost certainly never have to.

    Mrs Mullen recovered well and soon left hospital. It never occurred to me that I'd see her again, so I couldn't believe my eyes when a few weeks later I went to buy a sandwich from the hospital Friends' shop.

    “What are you doing here?” I asked. “You're supposed to be resting.”

    “Oh I am,” she replied. “It's only a few hours a week. I saw the ad for volunteers while I was staying here. It's my way of saying thank you for all that this hospital has done for me.”

    Thank you? Mrs Mullen is the sort of person who gives back more than she takes. I asked for a cheese and tomato sandwich. She handed me egg instead — it was all they had got. I hate egg, but I decided to eat it anyway and not to complain.

    I am sorry that I haven't written this letter before now. It has taken me three years to gather the courage. I have started it so many times in my head, but was afraid that you would think it disrespectful of me to write to you. It does seem strange writing to someone I have never met, but part of me feels that I know you very, very well.

    We read your file one morning in September. We knew the contents would be difficult. Later that afternoon, we received the call from our social worker to tell us that you had passed away. Suddenly, we knew what we had to do.

    There was never any doubt. All I remember was a desire to protect this little boy, to give him the love and care he deserved. And really that was that; as far as we were concerned, David was now our son. There were further meetings, questions, paperwork, decisions, arrangements and preparations. Then, two months later, we met him for the first time. I hope the fact that I call him “our son” does not offend you. Sarah, you will always be his birth mother. But I make no apology in referring to him as our son.

    For the past three years, we have loved and cared for David. We have dealt with his anger, his confusion and his anxieties. David was taken away from you soon after his second birthday. I cannot imagine the pain that must have caused you. We know that you really wanted to be a good mother to David, but you could not cope when his father left.

    It is tragic that your life ended so early. I don't know how I will explain all these things to David as he grows up, or how he will explain his story and what happened to him during his early years. I hope that it does not cast a shadow over his life as his understanding deepens. I hope you can find comfort in the fact that, from all this pain, Sarah, you have given us the most wonderful gift – an amazing little boy who is completely fearless.

    It is so unfair that you did not receive the love and the warmth in your childhood that David now takes for granted. And although you never chose to hand your beautiful baby over, I can only feel gratitude towards you for this wonderful little boy who has made our lives complete.

    As a Fulbright（富布莱特法案基金）scholar at Yale, I wanted very much to get some individual help from some famous professors, but their office-hours were only once a week and there were always students waiting outside. At first, I was too polite to get their help. Then I realized that Chinese politeness does not work in this society. I needed to be aggressive to get what I wanted. I also noticed that Chinese students or Asian students were very polite in class while American students often interrupted the professor, asking questions and dominating the discussion. The Chinese students were not as aggressive as American students.

    I was impressed by the role of the professor in the class. The professor didn't act as an authority, giving final conclusions, but as a researcher looking for answers to questions together with the students. One linguistic feature of his interacting with his students was that he used many modal verbs-far more than I did in Beiwai. When answering questions, he usually said: “this is my personal opinion and it could be wrong. It would be a good idea if you could read the book I mentioned the other day.” Or,“ You may find the book I recommended helpful.” Or,“You could be right, but you might find this point of view also interesting.” When making comments on students' performances, the professor usually said:” It might have been much clearer if you had taken in some of the ideas we discussed earlier this semester.”

    In China, authorities are always supposed to give wise decisions and correct directions. Therefore students always expect the professor to give an answer to the question. I still remember how annoyed they were when foreign teachers did not provide such an answer. Their expectations from authorities are much higher than those of American students. Once the Chinese students got the answer, they were sure about it. That is why they make far more certain statement than American students. That is why Chinese students find it difficult to use modal verbs because the function of modal verbs is to provide room for negotiation and different ideas.

I believe in the power of science fiction,not just for its capacity to transform dreams into reality, but also for its power to bond together those who share a common vision of the future. For me, that's true for my relationship with my dad. Some fathers and sons bond over sports, fishing or hunting, but my dad and I bond over Star Trek. We tried a trip to Disney World, but one of my earliest memories wasn't Mickey, but a Klingon battle cruiser（巡洋舰）on the screen.
Over the years, nearly every setting and situation has become far away for my dad and me. When it's warm at night, we're not driving along some dark streets in Indiana,but.going at a slow speed with stars dimly shining. Both of us are thinking of them,without needing to say a word. All these visions of other universes have together created a private universe for my dad and me.

Gene Roddenberry, creator of Star Trek,once said, "Science fiction is a way of thinking，a way of logic that bypasses（绕过）a lot of nonsense. It allows people to look directly at important subjects." A lifetime of science fiction has influenced more than just my relationship with my dad, but has also helped me shape my own hopes for the future.I'm now a science writer.

Yes,science fiction has made me into a nerd. And it also has been a source of joy for my family,making me an optimist while enabling me to think critically about the danger of technology.thank those authors who have shared their visions, the world and my family are better for it. Thank my dad, who is both the best storyteller and the best man i have ever known because he helped me realize the truth of Tennyson's words," since i dipped into the future,i saw the vision of the world,and all the wonders that would be.