It is very important to stay healthy. I have a neighbor. I often see her exercise in the morning. She looks young and beautiful, （虽然）she is over seventy years old,

Last week a reporter from a （杂志）interviewed her and asked how to keep in good （健康）.She said it was quite easy. Keep （你自己）active and find a hobby. Besides, it's （必需的，必要的）to learn at least one new thing every day.

（然而），according to the （结果）of a study, twenty （百分之……)of the students don't exercise at all! They eat junk food （几乎）every day and sleep less than six hours every night.They have to learn more about healthy habits. I （真正，确实）hope all people will stay young and healthy.

Everyone knows they feel much better after a good night's sleep，but now scientists have discovered it can help you to live longer too.According to a study in the US，healthy sleeping habits mean men can live almost five years longer the chance of heart disease.

However，a study shows it's not just about how long you sleep；theof your sleep is important too.Dr Frank Qian said sleep must be restful.The researchers said that good sleep for adults depended on five basic factors：

•getting seven to eight hours of sleep each night；

•having trouble falling asleep no more than twice a week；

•having trouble staying asleep no more than twice a week；

•not using m to get to sleep；

•waking up feeling rested at least five days a week.

Each factor was given one point with a total of five points.The researchers looked at the results of a survey of 172，321 people in the US that measured their health habits， i sleep，over five years.They found that people who had all five points were l to live longer and lead healthier lives than those who had sleep difficulties.

According to The Sleep Charity，a good night's sleep can improve people's memory.Dr Qian admits that no one's sleep is p  everyone has a late or restless night sometimes.However，he said， "Even from a young age，making sure they are sleeping tight...it can greatly b their overall long﹣term health."The study was based on people reporting their own sleep habits rather than recording them scientifically，so this may have affected the results and more research is needed.

We all do it. We all need it. Most of us need to do it for seven to nine hours a night. It is of course sleep. Many scientists believe the truth. An adult should get eight hours of sleep every night. However, some people can live without feeling sleepy after as little as six hours of sleep. But other people need about ten hours a night. Babies usually sleep between 14 to 17 hours a day. Usually they only stay awake for one to three hours. 

Do you take a nap (打盹)in the day? People say that some adults and children need to nap. This just depends on the person. One thing scientists have learned is that man is the only mammal (哺乳动物)that prevents himself from going to sleep. This can be bad for our bodies in many ways. Scientists believe not sleeping enough can make us eat more. And not sleeping enough can make us put on weight. Hopefully you are a good sleeper and get a good night' s rest tonight!

 Most Americans look after their health. In school, children learn to eat healthy food. They are told not to eat too much junk food. They know what is good or bad to eat. Many Americans are strict about what they eat. They country also has strict rules about food, so the food is often healthy and people can eat better food. 

Keeping healthy is often on the first list of Americans ‘ New Year' s Resolutions. Most Americans like joining health clubs to take exercise. Many stores sell sports shoes and clothes. Some people also buy thins and start exercise centers at home.

Now Americans exercise less than they did before. They number of people in health activities is smaller. Of high school students, only 37% students exercise three times a week. However, 70% young men watch TV at least an hour every day, and 38% of them watch TV more than three hours. About one third of the Americans are overweight. Though this isn' t good, we say Americans enjoy good health because medical care in the United States is the best in the world.

Do you know how to keep healthy?

First, good eating habits 1 very important. Many students 2 eating junk food. Maybe it tastes good, 3 it's bad for their health. And many students only eat 4 favorite food. It's also bad for their health. It's good to eat lots of fruit and vegetables because they can help us keep 5 good health. And we should have a balanced diet(平衡膳食). It can give us lots of energy(能量) and keep our body6 .

7 , we should exercise more. 8  strong (强壮的) and healthy body comes from enough exercise. We should spend some time 9  sports every day. 

Finally, we should have good living 10 , for example, getting up and going to bed on time. 

Everyone wants to be healthy. Then do you know how to keep in good health? You may say, "Having a balanced diet(平衡的饮食) and doing exercise can help us. " But I think good sleep is very important.

Lots of people in the world have sleep problems. They can't sleep well at night. The next day they are too tired to work well. They are not happy and tired. Then they may have some other problems.

How can people sleep well at night? Here are some good ideas. 

 Sleep in a quiet room. 

 Do some exercise before going to bed. It'll make you sleepy.

 Wash your feet in warm water before you go to bed. 

 Have a glass of milk. It's really good for sleeping.

 Don't think about boring things. Try to be relaxed.

Different weather makes people feel different. It influences health, intelligence(智力) and feelings. 

 In August, it is very hot and wet in the southern part of the United States. People there have heart trouble and other kinds of health problems during this month. In the Northeast and the Middle West, it is very hot at some times and very cold at other times. People in these states(州) have more heart trouble after the weather changes in February or March. 

 The weather can also influence intelligence. For example, in a 1983 report by scientists, IQ(智商) of a group of students was very high when a very strong wind came, but after the strong wind, their IQ was 10% lower. The wind can help people have more intelligence. Very hot weather, on the other hand, can make it lower. Students in many schools of the United States often get worse on exams in the hot months of the year (July and August). 

Weather also has a strong influence on people's feelings. Winter may be a bad time for thin people. They usually feel cold during these months. They might feel unhappy during cold weather. But fat people may have a hard time in hot summer. At about 18℃, people become stronger.

 Low air pressure(气压) may make people forgetful(健忘). People leave more bags on buses and in shops on low—pressure days. People feel best at a temperature of about 18℃. 

Are you feeling sad, tired, forgetful, or unhappy today? It may be the weather's problem.

People can enjoy all kinds of food these days. Some are good for health but others are unhealthy, like hamburgers and ice﹣cream. The following food is healthy and easy to find. 

Of course, we can have these healthy food together with other kinds of food. That will make meals healthy and delicious. 

It could be easier to have heart problems if a person doesn't eat breakfast, according to a new study. 

A team of scientists have studied 18 years of facts on 6, 550 people over 40 years old. These people had no heart problems.  59% of the people eat breakfast every day, but 5.1% never do, 10.9% hardly ever do, and 25% don't do for a few days.  If people don't eat in the morning, they are up to 87% more probably to have heart problems. 

One scientist said, "However, in the US, it's getting more and more common not to have breakfast. And 

23. 8% of the young people never eat breakfast. "

The team has found an important reason. Those who don't eat breakfast may more possibly eat unhealthy food. Some studies show that eating breakfast may help fight heart problems. 

At he beginning of 2021， the Chinese government said it will provide free COVID﹣19 vaccines（疫苗）to all Chinese citizens. Sine then， millions of people have gotten the vaccine. Let's make a closer look.

    ▲    

The vaccine is given by injection （注射）. It's suggested to get two doses. You should wait about two weeks after the first dose to get the second one.

Can people of all ages get vaccinated？

The vaccines have been tested among three different age groups： 3 to 17， 18 to 59， and 60 and above. The 18﹣to﹣59 age group has the most data （数据）﹣﹣the vaccines have been proven to be safe to this group. The other two groups are expected to be included soon.

Is there anyone who shouldn't get vaccinated？

Experts say the vaccines are safe for most people. But people who have serious diseases such as cancer or diabetes （糖尿病），or people who are allergic （过敏的） to any of the vaccine's ingredients， should not get it. People who want to get the vaccine should not get any other vaccines during the same period.

Do I still need to wear a mask in public places after I've been vaccinated？

Yes. It takes a few weeks for the body to build immunity after vaccination. This means it's possible for a person to get infected （传染的） just after vaccination. There's also a small chance that your body won't build immunity. So before the population becomes immune to the virus， it's highly encouraged to keep wearing masks， practicing social distancing （社交隔离） and washing your hands after getting vaccinated.