April is Financial Literacy Month，when Americans of all ages are encouraged to learn how to be smart about money.And this year，fifth­grade Rachel Kelly from Naperville，Illinois，is already at the head of her class.Kelly,11, won a nationwide contest called the Stock Market Game.

    Students who take part in the Stock Market Game，run by the SIFMA Foundation，a financial­education organization，pretend to buy stocks (股票) worth $100,000.Then they have to read financial news over several days to see if their investments would have gained money or lost money and write an article explaining their choices.

    “I  wanted  to  choose  a  company  that was well­known，” writes Kelly.“I thought about products that I see every day，so cars came to my mind.” Kelly picked the Japanese car company Honda Motors.“Honda Motor Company is the No.1 producer of motorcycles in the world and the fifth­largest producer of automobiles behind Toyota，Volkswagen，General Motors and Hyundai，” says Kelly.

    Honda makes many different kinds of cars，which Kelly thinks makes the company a safe investment.She explains that even if the cost of gas goes up，Honda has a good chance of staying in business because of the company's fuel­efficient cars，which run on less gas than most cars made today.

    “If one of their departments is not doing so well，it won't affect the overall company sales，” she writes.

    Because the stock Kelly picked performed well and her article was persuasive，Kelly won this year's contest.About 600,000 students from 4th to 12th grade competed.

     The World Meat Free Day for 2017 falls on 12, June, but what would actually happen if the whole world suddenly went vegetarian(素食的) permanently?

     If vegetarianism were accepted by everyone by 2050, the world would have about seven million fewer deaths every year. No meat would lower the chances of some diseases or even some cancers and so save the world 2-3% global GDP in medical bills. Food-related emissions would drop by around 60%. This would be due to getting rid of red meat which come from methane (甲烷) producing livestock (家畜) — from people's diets. Turning former pastures (牧场) into native habitats and forests would slow climate change and bring back lost biodiversity, including some animals which were previously pushed out or killed in order to keep cattle.

    However, farmers in the developing world could really suffer. Arid and semi-arid lands can only be used to raise animals as there's no or little water in these places, such as the Sahel land strip in Africa next to the Sahara; nomadic (游牧的) groups that keep livestock there would be forced to settle permanently and lose their cultural identities if there were no more meat. Losing meat also means that we also lose traditions. There's no more Christmas turkey. We would need to replace meat with nutritional substitutes, in particular for the world's estimated two billion-plus unhealthy or weak people for lack of nutrients. Animal products contain more nutrients per calorie than staples like grains and rice.

    Everybody currently engaged in the livestock industry would need to be retrained for a new career. This could be in agriculture, reforestation or producing bioenergy. Failing to provide career alternatives could lead to mass unemployment and social problems, particularly in traditionally rural communities.

    Feifei,an 11-year-old boy from Xuzhou,Jiangsu Province,suffered from a sudden acute eye disease which has almost led to blindness.The disease was caused by excessive（过度的）eye fatigue（疲劳）during the winter vacation, during which he played computer games for continuous 10 days and nights.

    Many youngsters in China nowadays are increasingly addicted to computer games and other electronic products. This is followed by a series of health problems,with the most typical case being myopia,or nearsightedness.

    According to the latest research report released by the World Health Organization (WHO),the myopia rate among Chinese teenagers ranks first in the world—70 percent of high school and college students.The rate is nearly 40 percent in primary school students,while it is only 10 percent for their peers in the United States.

    There are at least 10 million people in China with severe myopia,and they are likely to get pathological（病理性的）myopia in middle age.Pathological myopia can't be treated with glasses or surgery,and it is one of the biggest factors that lead to blindness,Xu Xun,director of the ophthalmology（眼科学）department at Shanghai General Hospital,pointed out.

    Experts explain that two major factors lead to the high rate of myopia among Chinese people.One is high academic pressure,and the other one is excessive use of electronic devices over a long period of time.Genetics,on the other hand,are not the main reason,as only 20 percent of Chinese people had myopia in the 1960s.

    "Teenagers are now faced with severe academic pressure,which means they often study without natural light. This increases their risk of becoming nearsighted,"Xu said.

    Experts suggest that youngsters maintain a proper balance between study and rest so as to protect their eyesight, and parents should play an active role in the process.

                                                                      How I Turned to Be Optimistic

    I began to grow up that winter night when my parents and I were returning from my aunt's house, and my mother said that we might soon be leaving for America. We were on the bus then. I was crying, and some people on the bus were turning around to look at me. I remember that I could not bear the thought of never hearing again the radio program for school children to which I listened every morning.

    I do not remember myself crying for this reason again. In fact, I think I cried very little when I was saying goodbye to my friends and relatives. When we were leaving I thought about all the places I was going to see—the strange and magical places I had known only from books and pictures. The country I was leaving never to come back was hardly in my head then.

    The four years that followed taught me the importance of optimism (乐观), but the idea did not come to me at once. For the first two years in New York I was really lost-having to study in three schools as a result of family moves. I did not quite know what I was or what I should be. Mother remarried, and things became even more complex (复杂的) for me. Some time passed before my stepfather and I got used to each other. I was often sad, and saw no end to “the hard times.”

    My responsibilities in the family increased a lot since I knew English better than everyone else at home. I wrote letters, filled out forms, translated at interviews with Immigration officers, took my grandparents to the doctor and translated there, and even discussed telephone bills with company representatives.

    From my experiences I have learned one important rule: almost all common troubles finally go away! Something good is certain to happen in the end when you do not give up, and just wait a little! I believe that my life will turn out all right, even though it will not be that easy.

    Seventy-three-year-old George McNeilon selected his food in Value Mart very carefully. After leaving the cashier, he estimated (估计) that he had saved 80 cents and thought that he had got good value for his money again.

    At the exit, the chilly wind reminded him of his gloves. "Now where are they?" He searched here and there, but nowhere could he find them. He was sure he was wearing them when he entered the store. The worried man made a second search in all his pockets, again including the grocery bag. He was sure they must have been dropped somewhere inside the store.

    George bought the gloves at a 25% discount, for just $30, ten years ago. They were genuine lambskin (小羊皮), soft, warm and durable. Until then, he had worn cheaper man-made material that lasted no more than three years. His impulsive decision to buy the expensive gloves turned out to be a good one, which even promoted his social status on the bus, as passengers stared at him enviously for six months out of the year. He enjoyed being envied.

    Bad luck, George thought, to lose his expensive gloves on New Year's Eve. He reentered the store and followed the same route he had walked before. But several minutes of anxious search turned out to be in vain. "Society has changed. People have changed …" he murmured to himself. "Years ago, if people picked up something lost, they would give it back."

    Back home, George was at a loss. In deep winter, he could not do anything without a pair of gloves. If he bought cheap ones, he would have to replace them very soon. If he bought new leather ones, they would cost forty dollars.

    After the holiday, poor George decided to buy another pair of leather gloves. Before boarding the subway, he stepped into Value Mart again to see if by any chance his gloves had been returned to the lost and found office.

    "What color are they?" the woman in the office asked.

    "Black," he answered.

    She looked into her drawer and drew out a pair of men's leather gloves.

    "Are they?"

    "Yes! Those are mine!"

In the story of "The crow and the Pitcher" from Aesop's Fables, a thisty crow (乌鸦)drops stones into a narrow jar to raise the low level of water inside so he can take a drink.

Now scientists have evidence to back up that story. Crows actually do understand how to make water displacement (移位) work to their advantage, experiments show. The results suggest that the birds are, at least in some aspects, as smart as first-graders.

Researchers, led by Sarah Jelbert at the University of Auckland in New Zealand, presented six crows with tubes filled with water. Inside the tubes, a worm or piece of meat on a piece of wood was floating, just out of reach of the crow. In front of the tubes, the researchers arranged several rubber erasers that would sink, and some plastic objects that would float. The crows found out that they could drop the erasers into the tubes in order to raise the water level and get their snack.

However, the birds handled awkwardly in experiments in which they could choose to drop objects in either a wide tube or a narrow one to get a snack, the researchers said. Dropping objects into narrow tube would lift the water level by a greater amount and put the treat within reach after just two drops; while it took around seven drops to raise the snack to the same level in the wide tube. The crows obviously didn't realize this, and most of them went for the wide tube first.

Previous studies showed that chimps and human children can solve similar tasks. In a 2011 study, chimps and kids found out that they could put water into a tube to reach a peanut that was floating in a small amount of water at the bottom.