Eyesight 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 yearly exams. {#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). Long­term 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. Two­thirds 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 20­second 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 wear.

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

                                                 The Bystander (旁观者) Effect

    When an emergency situation occurs, observers are more likely to take action if there are few or no other witnesses.{#blank#}1{#/blank#}

    The bystander effect is also called the Genovese effect, which is named after Catherine “Kitty” Genovese, a young woman who was cruelly murdered on March 13, 1964. Early in the morning, 28-year-old Genovese was returning home from work. As she approached her apartment entrance, she was attacked and stabbed (刺) by a man later identified as Winston Moseley. Despite Genovese's repeated cries for help.{#blank#}2{#/blank#}The attack first began at 3:20, but it was not until 3:50 that someone first contacted police．

    Many psychologists were set thinking by the incident, as well as most Americans. As the conclusion, the bystander effect came out and later proved by a series of studies and experiments.

    There are two major factors that contribute to the bystander effect.{#blank#}3{#/blank#}Because there are other observers, individuals do not feel as much pressure to take action, since the responsibility to take action is thought to be shared among all of those present. The second reason is the need to behave in correct and socially acceptable ways. When other observers fail to react, individuals often take this as a signal that a response is not needed or not appropriate.

    {#blank#}4{#/blank#} In the case of Kitty Genovese, many of the 38 witnesses reported that they believed that they were witnessing a "lovers' quarrel", and {#blank#}5{#/blank#}

A. They hesitate and assess the risk of getting hurt

B. This phenomenon is referred to as the bystander effect.

C. Other researchers have found that onlookers are less likely to take action if the situation is unclear.

D. First, the presence of other people creates a division of responsibility.

E. they did not realize that the young woman was actually being murdered.

F. none of the people in the nearby apartment building who heard her cries called police for help.

G. the attacker didn't stop stabbing her.

    Cross-country skiing can be enjoyed by a wide range of students, from the youngest kindergartners to those secondary students. It is really a fun activity, providing students a gentle workout outside in winter. While having fun, students can gain physical and mental benefits.

    The physical benefits of cross-country skiing are well-known. If we look at Olympic cross-country skiers, we can see the positive effects on the body that result from training for cross-country skiing.

    The average best female cross-country skiers carry 11 percent body fat, and best male skiers carry 5 percent. These percentages are well below the average people who are considered to be athletic—17 percent for females and 10 percent for males. Burning a high number of calories while skiing helps to keep skiers slim in a healthy and attractive way.

    Cross-country skiing is also an efficient way to exercise a large number of muscles at once. The upper body gets much more of workout because skiers use ski poles as a means of propulsion (推进), the force that drives skiers forward. Of course, the leg muscles also do their fair share. People who use cross-country skiing as a workout over several weeks will discover that the muscles of their whole body increase in strength.

    Cross-country skiing on a regular basis has a tremendous effect on a person's cardiovascular (心血管的) system. In addition to gaining strength in the muscles of the upper and lower body, people who use cross-country skiing as a workout method over several weeks will also discover that their heart is stronger. A strong heart pumps more efficiently, sending out more blood to the muscles with each contraction (收缩). Through weeks of skiing, people often discover that their resting heart rate has decreased. Highly trained Olympic cross-country skiers have resting heart rates between 28 and 40 beats per minute. Compare that to the resting heart rate of the average person, which is 60 to 80 beats per minute!

    The benefits of cross-country skiing extend beyond overall general health. A lot of evidence exists showing that regular physical activities increase the release of mood-lifting endorphins  (内啡肽) in the body. After fun skiing lessons, students will be full of energy; they will be relaxed and in a better mood than when they started class. Students will leave class with a sense of accomplishment, knowing that they have developed new skills in a fun activity.

Cross-country skiing is a great way to exercise the whole body. Now more and more students are taking part in this exercise outside during the winter months. They are enjoying it and benefiting from it!

    A lot of kids and adults say they get nervous during social situations. Maybe it's speaking up in class or making a phone call or just trying something new. You might feel butterflies in your stomach, or your heart may beat faster or you get suddenly sweaty. {#blank#}1{#/blank#} And if fear of being embarrassed or making a mistake is getting in your way, there are some things you can try on your own to help.

    {#blank#}2{#/blank#}

    Experts agree that avoiding situations that make us anxious can actually make things worse in the long run. Getting out of something you didn't want to do might make you feel better in the moment, but you will still feel anxious the next time you're asked to do it.

    Push yourself.

    While leaving your comfort zone isn't easy, it can be very good for you. That's because anxiety tends to go away when you start doing the things that make you anxious.{#blank#}3{#/blank#}You might find you have the skills to handle it. And next time you're in that situation you might feel less self-conscious.

    Practice a lot.

    As an experiment, try doing something that makes you nervous.{#blank#}4{#/blank#} Whatever you do, you'll find that it gets easier over time. That's because by practicing the things that make you nervous you are actually improving your ability to easily handle them.

    Relax yourself.

    Instead of trying to relax by watching television or visiting a website, try a deep relaxation practice that has a physical effect on the mind.{#blank#}5{#/blank#}

A. Don't avoid something.

B. Being nervous is uncommon.

C. Pay no attention to your original thoughts.

D. Those things are your body's reaction to fear.

E. Start with little things like answering questions in class.

F. So try to face your anxiety and fear and see what happens.

G. For example, doing things like yoga can also help you stay calm.

This Way to Dreamland

    Daydreaming means people think about something pleasant, especially when this makes them forget what they should be doing. Daydreamers have a bad reputation for being unaware of what's happening around them. They can seem forgetful and clumsy. {#blank#}1{#/blank#}They annoy us because they seem to be ignoring us and missing the important things.

    But daydreamers are also responsible for some of the greatest ideas and achievements in human history. {#blank#}2{#/blank#}Can you imagine what kind of world we would have without such ideas and inventions?

So how can you come up with brilliant daydreams and avoid falling over tree roots or otherwise looking like a fool?

    First, understand that some opportunities(机会) for daydreaming are better than others. Feeling safe and relaxed will help you to slip into daydreams. {#blank#}3{#/blank#}And if you want to improve your chances of having a creative idea while you're daydreaming, try to do it while you are involved in another task—preferably something simple, like taking a shower or walking, or even making meaningless drawings.

It's also important to know how to avoid daydreams for those times when you really need to concentrate. "Mindfulness", being focused, is a tool that some people use to avoid falling asleep.{#blank#}4{#/blank#}.

    Finally, you never know what wonderful idea might strike while your mind has moved slowly away. Always remember that your best ideas might come when your head is actually in the clouds.

A. Having interesting things to think about also helps.

B. They stare off into space and wander by themselves.

C. Without wandering minds, we wouldn't have relativity, Coke or Post-it notes.

D. At one time, daydreaming was thought to be a cause of some mental illnesses.

E. It involves slow, steady breathing for self-control that helps people stay calm and attentive.

F. Daydreams are often very simple and direct, quite unlike sleep dreams, which may be hard to understand.

    When we were growing up in our grandparents' home, Jack, my grandfather, was always in his room sitting in the chair and listening to the radio. The voices speaking from the metal box day and night, taught us that there was a larger world outside. He would roll the black dial (刻度盘) back and forth until the signal was clear. Then he would listen.

    Now he is old and falls ill. When I went to visit him, he said to me, "I dislike the Internet. The problem is that we're losing primary contact with each other. No more shaking hands. Everyone is so busy. We want too much and in the process of getting it we miss so much." He stopped for a while. "It makes me lonely and sad." Then he looked at me, "I just want to hear your voices."

    I think of all the voices on the radio he has spent a lifetime listening to. I asked, "How did you become interested in radio?" "I don't know," he said. "It was another way to reach people. I was always interested in searching for a better signal, a clearer, more powerful signal that could communicate with someone somewhere."

    "And I'll tell you another funny thing: you can electronically eliminate all kinds of noise from the signal, but you can't get rid of natural noise caused by thunder and lightning, rainstorms, or snowstorms."

    He closed his eyes and smiled. "I was just thinking that in spite of all our technologies, maybe we haven't progressed that far as human beings. We shouldn't forget we still have the same basic needs."