Eyesight（视力） plays a very important role in our daily life. Every waking moment, the eyes are working to see the world around us. Over forty percent of Americans worry about losing eyesight, but it's easy to include steps into our daily life to ensure healthy eyes. Here are five suggestions for a lifetime of healthy eyesight：

    Schedule（安排）yearly exams(检查). {#blank#}1{#/blank#} Experts advise parents to bring babies 6 to 12 months of age to the doctor for a careful check. The good news is that millions of children now can have yearly eye exams and following treatment, including eyeglasses.

    Protect against UV rays (紫外线). Long－term stay in the sun creates risk to your eyes. No matter what the season is, it's extremely important to wear sunglasses. {#blank#}2{#/blank#}

    Give your eyes a break. Two－thirds of Americans spend up to seven hours a day using computers or other digital products. {#blank#}3{#/blank#} Experts recommend that people practice the 20/20/20 rule: every 20 minutes, take a 20－second break and look at something 20 feet away.

    {#blank#}4{#/blank#} As part of a healthy diet, eat more fruits and vegetables each day. Vitamins (维生素) C and E help protect eyesight and promote eye health.

    Practice safe wear and care of contact lenses (隐形眼镜). Many Americans use contact lenses to improve their eyesight. While some follow the medical guidance for wearing contact lenses, many are breaking the rules and putting their eyesight at risk. {#blank#}5{#/blank#} Otherwise, you may have problems such as red eyes, pain in the eyes, or a more serious condition.

A．Eat your greens.

B．Eye care should begin early in life.

C．They can properly protect your eyes.

D．Stay in good shape by taking more vitamins.

E．Parents usually don't care about their own eyesight.

F．Always follow the doctor's advice for appropriate（适当的）wear.

G. This frequent eye activity increases the risk for eye tiredness.

    Today, we know that the role of vitamins and minerals goes way beyond the prevention of deficiency diseases (维生素缺乏症) to actually preventing cancer and heart disease, the most fearsome killers of our time. With this knowledge has come the widespread call for nutritional supplementation (营养补充) — and a confusing group of vitamin, mineral, and supplements lining the supermarket shelves.

    Far from contributing to better health, however, nutritional supplements threaten to turn a scientific breakthrough into a nutritional disaster.

    Promoters of vitamins and minerals — especially vitamins A, C, and E— would have consumers believe that the little vitamin pill in the bottle is all they need for good health. Take your vitamins in the morning, and you're covered. It's okay to eat fast foods for the rest of the day or skip meals to achieve today's fashionably skinny look. But vitamins and minerals are only one part of the nutritional puzzle. A diet rich in fiber (纤维) and balanced in carbohydrates and protein is essential for good health. You can't get these things from a nutritional supplement. The focus on vitamin and mineral supplements may actually be robbing us of the full nutrition we seek.

    And no supplement can compare to the quality of nutrition found in natural sources. For example, our bodies turn carotenes (胡萝卜素) from plant foods into vitamin A. Many supplements contain a single carotene, but natural sources are rich in many different carotenes. Many supplements contain a form of vitamin E that is made from chemicals, when natural vitamin E is more readily absorbed and used by the body. And science is still discovering the wealth of nutrients in foods.

    You'd be hard-pressed to find a supplement as nutritionally comprehensive and powerful as a balanced diet. Even if you could, you'd pay much more than if you got the same nutritional value from natural sources.

    But perhaps the greatest danger presented by nutritional supplements comes from the very real risks presented by self-medication. Anyone can walk into the market and buy as many different supplements as desired. The reported benefits of high dosages of certain nutrients have led some people to believe that the more the better. Many take several vitamin and mineral supplements without regard to possible consequences.

    Surprising new research suggests that vitamin C pills may speed up hardening of the arteries, the underlying cause of heart attacks. Researchers said their findings support the recommendations of health organizations, which urge people to avoid high doses of supplements and to get their nutrients from food instead.

    As appealing as they're made to sound, nutritional supplements are danger in disguise. If you're looking for good health, don't look on the supplement shelves of your supermarket. Look in the produce section instead.

    Plants are helpful to human: they provide us with wood and other products, they give us shade, and they help to prevent drought and floods.

    Sadly, in many parts of the world man has not realized that the third of these services is the most important. In his eagerness to draw quick profit from the trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had.

    Several thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire but, without its trees, its soil became hard and poor. When the empire fell to pieces, the country found itself faced by floods and starvation.

    Even if a government realizes the importance of a plentiful supply of trees, it is difficult for it to persuade the villager to see this. The villager wants wood to cook his food with, and he can earn money by making charcoal(木炭) or selling wood to the townsman. He is usually too lazy or too careless to plant and look after trees. So unless the government has a good system of control, or can educate the people, the forests will slowly disappear.

    This does not only mean that the villagers? Sons and grandsons have fewer trees. The results are even more serious. For where there are trees their roots break the soil up—allowing the rain to sink in and also hold the soil, thus preventing it being washed away easily, but where there are no trees, the soil becomes hard and poor. The rain falls on hard ground and flows away on the surface, causing floods and carrying away with it the rich topsoil, in which crops grow so well. When all the topsoil is gone, nothing remains but a worthless desert.

    For Pei Shiyou, this year's Lunar New year's Eve was among the few he ha spent with his extended family.

“It's one of the benefits of starting a business in my hometown,” said Pei, who was born and raised in Hefei, Anhui province, and will soon turn 60. His wish for the Year of the Dog is to see smart glass— the product his team has been developing since 2016—go into production.

    Starting a business with a creative research team and receiving government support have given him a strong sense of pride, a feeling he says he often lacked during his 25 years working in the United States, he said.

    He was among Chinas first students to travel to the US for postgraduate stud. After that, he landed his first job at Amoco Corp and later moved to California eventually becoming head of product research and development at KLA-Tencor, a global capital equipment company in Silicon Valley. Yet Pei said he still felt unfulfilled and unsatisfied.

    “It seemed there was an invisible ceiling for me when I pursued my career in the US. I felt like it was unlikely for me to achieve any higher sense of achievement or recognition.”

    He returned to China in 2017, and nine years later established a smart-glass company in Hefei with two other US-trained engineers.

    The company's product is suitable for low-temperature, flexible smart-film manufacturing and is able to self-adjust its level of transparency based on temperature changes and sunlight conditions, according to Pei, who said it has the potential to reduce the need for air conditioning and make curtains abandoned.

    Between 2007 and 2016, Pei lived and worked in several Chinese cities. “What attracts me to Hefei is that it is easy to gather tech talents here due to the city's rapid development in recent years, and also because it has several universities,” he said. Support from the local government has been one of the best attractions that convinced Pei to locate his company in the eastern Chinese city.

    In January last year, Hefei was approved as the site of a national-level science center, the second of its kind after an earlier one was built in Shanghai. The center, now under construction, will focus on areas including information technology, energy and health.

    Once upon a time, there was a lovely vegetable field, on which grew a very thick tree. Both the vegetables and the tree gave the place a wonderful appearance, which was the joy of the garden's owner. What no one knew was that the vegetables in the field and the tree couldn't stand each other. The vegetables hated the tree's shadow, because it left them only just enough light to survive. The tree, on the other hand, hated the vegetables because they drank nearly all the water before it could get to him, leaving him with just enough to survive.

    The situation became so extreme that the vegetables got totally fed up and decided to use up all the water in the ground so that the tree would dry up. The tree answered back by refusing to give the vegetables shadow from the hot midday sun, so they both began to dry up. Before long, the vegetables were really thin and the tree's branches were drying up.

    Neither of them thought that the gardener, on seeing his vegetable field becoming worse, would stop watering it. When he did that, both the tree and the vegetables really learned what thirst was. There seemed to be no solution, but one of the vegetables, a small courgette（小胡瓜）, understood what was going on, and decided to deal with it. Despite the little water and the unbearable heat, the little courgette did all he could to grow, grow... He managed to grow so big that the gardener started watering the field again. The gardener wanted to enter that beautiful big courgette in some gardening contest.

    They should really learn how to live in harmony）with those around them, doing the best they could. So they decided to work together, and help each other instead of fighting, using both the shadow and the water in the best combination to grow good vegetables. Seeing how well they were doing, the gardener now gave the best of care to his vegetable field, watering it better than any other field for miles around.

    Dr. Amanda Harris was ready for sleep since it was already 11 pm. The phone rang. On the other end of the line was a woman about to break a promise. The woman was her mother's neighbor. Flora Harris had made the neighbor swear she wouldn't tell her daughter she'd had a heart attack and was in hospital. The neighbor wisely decided to disobey orders.

    Amanda desperately wanted to get to the hospital immediately, but she couldn't. She lives in Washington D. C. and her mother lives in California. For the past year and a half, Amanda has gone to Los Angeles every other month to take care of her mother. Flora Harris takes care of her husband, James, who's 91 and has Alzheimer's disease. They live in their own home, and a caregiver comes to help them a few hours a day.

    Amanda is one of many Americans facing the heartache of how to take care of aging parents from afar. She's often worried and guilty, not to mention busy with a demanding job, two teenage daughters and the frequent trips to California.

    In some ways, Amanda is lucky. She has the resources to make the trips to Los Angeles. Plus, she is a doctor who treats the elderly. She's treated countless patients whose children live far away.

    “But it's still tough,” she says. “I can foresee what the next few years are going to look like, and it's not a pretty picture. There will come a time when my father won't recognize me and I worry he's going to be violent and hurt my mother.”

    So what do you do when you live a continent away from your aging, sick parents? You can hire someone to help, but you can't count on it completely.