Not having done physical exercise for some time, I found myself a little low-spirited and couldn’t study efficiently, so I decided to do some running the next day. At 6:15 the next morning, my alarm clock rang. Unwilling to rise from my bed, I turned it off and went back to sleep. However, 5 minutes later, I struggled to get up. After washing and brushing, I had my sneakers on and went out.

Wow! The air was so fresh that I couldn’t help breathing it deeply. I stretched (伸展) my arms and legs, then started to run. I found all things around me were so attractive. Look, the branches were waving, as if they were welcoming me; the blossoming flowers were bowing, with shyness, just like girls. Listen, the wind was whispering, as if to say “come on, girl”. What’s more interesting was those two birds, perching in the tree. They were scared and flew away when I passed them. “Hey, chaps, relax.” I shouted without stopping running. “Let’s enjoy the beautiful morning together!” Then miracle (奇迹) happened. The two little creatures seemed to understand what I said. They turned back and twittered (吱吱叫) around me. “Are you singing for me?” I asked. They twittered again and again, sounded like “Yes”. I was delighted to hear that. Ah, what a wonderful morning and how beautiful life is!

Actually, there are a lot of charming things around us. Helen Keller wrote in her famous article Three Days to Sec, “The seeing see little”. Indeed, many of us ignore (忽视) the beauty around us, just because we are familiar with them. They always complain that life is boring. But, I just want to say, if you live each day with appreciation of things around, you’ll find life is very charming. So, let’s enjoy life from now on.

For better eyesight (视力), doctors advise limiting (限制) the hours of screen time and encourage having enough eye resting time.

However, another study shows that sitting in front of computer or TV screens for long hours is not the only reason for myopia (近视). An Australian research team studied young children in Sydney and Singapore to find the reasons for myopia. The research team found that there were less children who had myopia in Sydney than those in Singapore, even though they spent more time in front of computer and TV screens. The major finding is that children in Sydney spend longer hours on outdoor sports than those in Singapore.

Indoor and outdoor sports both make the eyes pay attention to more distant (远处的) objects, which stops the eyes from changing original shape. But outdoor sports may be better than indoor sports for myopia. Because natural light is good for eye growth and vitamin (维他命) D from the sunlight might be useful to it. Many doctors suggest that every child get its first eye test when he/she is about two and half years old, and even if his/her sight seems good enough. It is necessary for myopic(近视的) children to wear glasses to stop headaches, trouble reading and so on. It is also important that schools invite doctors to test their students’ eyes.

If that is not possible, school teachers should at least encourage parents and children to have regular eye examination and wear glasses. And parents should remember not only to limit the total screen time for their children, but also to encourage them to spend time outdoors.

How Teens Can Stay Fit

Any type of regular, physical activity can improve your fitness and your health. Doing physical exercise is easy, but the difficult thing is that you keep moving!【小题1】, like brushing your teeth, eating, and sleeping. It can be in gym class, joining a sports team, or working out on your own. Keep the following tips in mind:

【小题2】. A good mental attitude is important. Find an activity that you think is fun. You are more likely to keep with it if you choose something you like. A lot of people find it’s more fun to exercise with someone else, so see if you can find a friend or family member to be active with you.

Take it one step at a time.【小题3】. For example, walk or ride your bike to school or to a friend’s house instead of getting a ride. Get on or off the bus several blocks away and walk the rest of the way. Use the stairs instead of taking the elevator or escalator.

Get your heart pumping (跳动). Whatever you choose, make sure it includes aerobic (有氧的) activity that makes you breathe harder and increases your heart rate. This is the best type of exercise because it increases your fitness level and makes your heart and lungs work better.【小题4】. Examples of aerobic activities are basketball, running, or swimming.

Don’t forget to warm up with some easy exercises or stretching (拉伸) before you do any physical activity.【小题5】. Stretching makes your muscles and joints more flexible too. It is also important to stretch out after you exercise to cool down your muscles.