Recently some American scientists have given a useful piece of advice to people in industrialized nations．They say people should eat more of the same kind of food eaten by humans living more than 10,000 years ago． {#blank#}1{#/blank#}

     The scientists say that the human life has changed greatly．Our bodies have not been able to deal with these changes in life style and this had led to new kinds of sicknesses． {#blank#}2{#/blank#} So they are called "diseases of civilization"．Many cancersand diseases of the blood system are examples of such diseases.

      Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol or tobacco, probably none． {#blank#}3{#/blank#}  However, a change in food is one of the maindifferences between life in ancient times and that of today.

      Stone Age people hunted wild animals for their meat, which hadmuch less fat than domestic ones．They ate a lotof fresh wild vegetables and fruits．They did nothave milk or any other dairy products, and they made very little use of grains． {#blank#}4{#/blank#}  We eat six times more salt than our ancestors．We eat moresugar．We eat twice as much fat but only one third as much protein andmuch less vitamin C.

{#blank#}5{#/blank#} But scientists say that we would be much healthier if weeat much the same way the ancient people did, cutting the amount of fatty,salty and sweet food.

A．Stone Agepeople lived a simple life.

B．But today, weenjoy eating a lot of these.

C．In that case,they would live much healthier.

D．Ancient people also got lots of physical exercise.

E．These new sicknesses were not known in ancient times.

F．People today probably don't want to live like our ancestors.

G．Modern people used to suffer from "diseases of civilization".

    Why is pink or purple a color for girls and blue or brown for boys?

The answer depends largely on cultural values as well as personal experiences. To the Egyptians, green was a color that represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. In China, children are given money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect themselves against evils (灾祸).

    People's choice of colors is also influenced by their bodies' reactions (反应) toward them. Green is said to be the most restful color. It has the ability to reduce pain and relax people both mentally and physically. People who work in green environment have been found to have fewer stomachaches.

Red can cause a person's blood pressure to rise and increase people's appetites (食欲). Many decorators will include different shades of red in the restaurant. Similarly, many commercial (商业的)websites will have a red “Buy Now” button because red is a color that easily catches a person's eye.

    Blue is another calming color. Unlike red, blue can cause people to lose appetite. So if you want to eat less, some suggest that eating from blue plates can help.

    The next time you are deciding on what to wear or what color to decorate your room, think about the color carefully.

    Science has a lot of uses. It can uncover laws of nature, cure diseases, make bombs, and help bridges to stand up. Indeed science is so good at what it does that there's always a temptation(诱惑) to drag it into problems where it may not be helpful. David Brooks, author of The Social Animal: The Hidden Sources of Love, Character,and Achievement, appears to be the latest in a long line of writers who have failed to resist the temptation.

    Brooks gained fame for several books. His latest book The Social Animal, however, is more ambitious and serious than his earlier books. It is an attempt to deal with a set of weighty topics. The book focuses on big questions: What has science revealed about human nature? What are the sources of character? And why are some people happy and successful while others aren't?

    To answer these questions, Brooks surveys a wide range of disciplines（学科）. Considering this, you might expect the book to be a dry recitation of facts. But Brooks has structured his book in an unorthodox(非常规的), and perhaps unfortunate, way. Instead of introducing scientific theories, he tells a story, within which he tries to make his points, perhaps in order to keep the reader's attention.So as Harold and Erica, the hero and heroine in his story, live through childhood, we hear about the science of child development and as they begin to date we hear about the theory of sexual attraction. Brooks carries this through to the death of one of his characters.

    On the whole, Brooks' story is acceptable if uninspired. As one would expect, his writing is mostly clear and, to be fair, some chapters stand out above the rest. I enjoyed, for instance, the chapter in which Harold discovers how to think on his own. While Harold and Erica are certainly not strong or memorable characters, the more serious problems with The Social Animal lie elsewhere. These problems partly involve Brooks' attempt to translate his tale into science.

    If you are given only 1 yuan, could you live in a city for one day? It seems this may be a little difficult. But students from Xi'an did it.

    On April 10, more than 60 students from the Middle School Attached to Northwestern Polytechnic University took part in the One Yuan Metropolis Survival. The charitable organization for teenagers called Imperceptible Education held this activity. Students not only have to live, but they also have to deal with a lot of hard tasks. It has happened in eight cities and is going to four others, including Beijing, in June.

    To make money, many students looked for part-time jobs and saw how hard life was. Zhang Queue, 14, asked more than 10 restaurants for a job and finally got one chance. “We were sad when they said no. But gradually (逐渐地), we got used to it,” he said. After being a waiter for an hour, he got 25 yuan.

    Some made use of their talents by singing and dancing in parks or shopping malls. Many people who walked by took notice and helped them. Zhao Jincheng, 14, drew pictures and made paper crafts(手工). “This showed it's important to learn a special skill,” he said.

    Living was hard, but finishing the tasks wasn't any easier. They went to different places to finish tasks in a short time. The most amazing one was when they had to exchange things worth thousands yuan with only a piece of paper in half an hour. “We learned how to persuade others. From a balloon to a cake to a bottle of yogurt (酸乳) … after almost 20 tries, we got an expensive necklace,” he said. They will give all of the money they made to poor schools in Tibet.

    When I was 5 years old, I started losing weight. My parents noticed I was pale and always thirsty. They had me tested to see if my blood sugar was high because they thought that might be causing my symptoms.

    My blood sugar was five times higher than normal. That can be deadly. My parents rushed me to the hospital. That's when my whole life changed.

    The doctors said I had Type 1 Diabetes (糖尿病).That means my body can't make insulin (胰岛素).There's no cure.

    My parents had to give me insulin shots every day and I had to get over my fear of needles quickly. Sometimes I had 10 band-aids on my fingers at once.

    Now that I'm older, I check my own blood sugar and give myself shots. About four years ago, my mom started traveling to rural Guatemala. She goes twice a year to help people in need.

    I have been a Girl Scout since kindergarten. For a Girl Scout project, I put together a team to go to Guatemala to test people there for diabetes. We went for four days last July. We tested 378 children and 100 adults. We found three adults with a different kind of diabetes, called type 2. We also found one little girl with dangerously low blood sugar. She cried when we told her. She had been feeling dizzy and didn't know why. It was like replaying what happened to me when I was little. I talked through a translator, but everyone understood hugs. I gave more hugs than I've ever given.

    Having type 1 diabetes is hard. But I have accepted it readily. It has helped me meet amazing people. It has made me responsible and independent. It has also shown me the power of taking action. I'm going back to Guatemala this summer to test more kids. I want to help as many kids as I can. But my greatest wish is for a cure. Type 1 diabetes changes your life. If no other child ever has to have it, that would be amazing.

    Last fall, I happened to overhear a student telling the others he had decided not to sign up for an introductory philosophy course. The demands of his major, he said seriously, meant he needed to take "practical" courses, and "enlightenment" would simply have to wait. For now, employability was the most important.

    The students' conversation fits into a larger alarming narrative about the role of the humanities in higher education. In a time of dizzying technological achievement and of rapid scientific innovation, sceptics of the humanities may question the usefulness of studying Aristotle, the Italian Renaissance or Chinese fiction.

    Actually, I regret not interrupting that student to argue for taking that introductory philosophy course. I would have started by reminding him that, for much of America's history, college graduates were not considered truly educated unless they had mastered philosophy, literature, political theory and history. The key role of higher education was to invite students into the conversations about matters like what it means to be alive and the definition of justice. Fostering engagement with these subjects is still an essential part of the university's function in society.

    I would have also mentioned to the student that he was misinformed about the job market. It is true that many employers are looking for graduates with specialized technical skills, but they also look for other capabilities. As the world is transformed by artificial intelligence, machine learning and automation, the unique human qualities of creativity, imagination and moral reasoning will be the ultimate coin of the realm. All these skills are developed in humanities courses.

    Further, I would have argued that while a degree anchored in the sciences is an important precondition for many jobs, it is not the only route. Look no further than the founders of companies such as LinkedIn, Slack and Flickr, who are among the many tech businesspersons with degrees in the humanities, and who credit that training for their success.

    Contrary to the widely held belief that humanities majors have a hard time getting jobs, recent studies show that those with humanities degrees are successful in the workplace, experiencing low rates of unemployment and reporting high levels of job satisfaction. The ratio between average median(中位数) incomes for humanities degree holders and those with business, engineering, and health and medical sciences degrees has been shown to narrow over the course of a career.

    The case for the humanities can also be understood in less transactional terms and more as a foundational preparation for a life well lived. A humanities education plays a vital role in encouraging citizens to lead an examined life. It fosters critical thinking, self-reflection, empathy and tolerance, the usefulness of which only becomes more apparent as one navigates life's challenges.

    By all means, students should take courses they think practical and follow their interests, but if they also make a point of studying the literature of the Renaissance, or researching into modern poetry, or even taking introductory philosophy, we will all benefit.