Japanese researchers have invented a special kind of electric chopstick recently.     1     So the chopsticks can help people take in less salt while they are enjoying delicious food.

    2     The chopsticks are connected to a small device (装置) worn by the eater. Weak electricity carries sodium ions (钠离子) from food through the chopsticks to the mouth. They’ll create a sense of saltiness in the mouth. As a result, the salty taste increases by 1. 5 times.

The traditional diet in Japan is salty.     3     That is twice the amount (数量) one should take in according to the World Health Organization (WHO). Too much salt intake may lead to high blood pressure, strokes (中风) and some other illnesses.

    4     “If we try to avoid taking in too much salt in the usual ways, we need to delete a lot of our favorite food from our food list. Or we have to eat tasteless food," the researcher said. Now, the electric chopsticks provide us with another way to take in less salt.

How amazing the electric chopsticks are! You may be looking forward to using them.     5    

The scientists are improving their chopsticks and hope to have them ready to sell as early as next year.

3 . Today, most people are very busy because of long hours’ work, so fast food becomes their first choice most of the time. These might be the food with high calorie and sugar, like hamburgers, fried food and soft drinks. We also see them as junk food.

Our bodies will make a special chemical (化学物质) when we eat junk food. It can make us feel good. But it doesn’t go long. About an hour later, we feel tired and hungry again. Some people solve (解决) this by having more junk food. Same things will happen the next day and never end.These eating habits can bring serious health problems. We may start having problems with our sleep. And we may not remember things well. Doctors tell us to eat less junk food. However, when we feel bad, it’s easy to forget doctors’ advice.

Changing our habits is difficult, but we can try it. If we want some chocolate, have a little. Choose black one—it has less sugar. If you usually go to fast food restaurants, cook the week’s meals on weekends instead and keep them in your fridge. Then, even if you are busy, you can still have a healthy meal.

5 . This is David, an English boy. He is 12 years old. He loves hamburgers. He has one hamburger in the morning, three hamburgers and two ice-creams in the afternoon. For dinner, what does he have? Three hamburgers and a coke（可乐）.

Some scientists say, “Hamburgers, ice-cream and coke are nice but eating them too much is not good.” If we have food like hamburgers too much, what can we get?

Scientists had an experiment（实验）on rats（老鼠）to find the answer.

Here are three groups（组）of rats: Group One have fruit and vegetables. Group Two have some vegetables and hamburgers. But they can have hamburgers for only one hour every day. Group Three have hamburgers and vegetables, too. But rats in this group can have hamburgers all day.

The rats in Group Three like hamburgers very much and always want them. After the experiment, they are the fattest（最胖）.

Can it be the same with people? Some scientists say “Yes”. It is OK to love food like hamburgers, but having seven hamburgers a day like David sounds “fat”. You don’t want to be too fat, right? Ice-cream is nice and cool. It’s OK to have one ice-cream after dinner. But it’s not OK to have five ice-creams after dinner. We don’t want to be the fattest “rats”.

6 . Do you want to keep thin and look good? Do you want to stay away from health problems? Do you have sleep problems and want to get a better sleep? Do you want to make more friends? If you do, just exercise! You may hear lots of ways to keep healthy. Here some easy-to-remember ways for you.

Eat healthily.       It’s important to eat vegetables and fruit every day. It’s also a good idea to eat less sugar（糖）and drink more water.

Move more and sit less. Although about 150 minutes of exercise a week is good, experts（专家）say that any activity is better than nothing. So try to stand up more often and do more activities.

Get enough sleep. Most people need about 7-9 hours of sleep each night. If you feel tired when you do an activity, or if you need to drink coffee to make you not sleep, you may not get enough sleep. It’s not easy to get enough sleep, but it is a must for good health.

Don’t exercise by yourself. When you exercise, ask a friend to go with you. He or she can encourage（鼓励）you when you feel tired. Then you will not stop exercising halfway (中途).

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I have a friend. Her name is Li Yun. She is in Beijing, China. She is 12. Her father is from England and her mother is from China.

Li Yun likes eating Chinese food. She is very healthy. How does she keep healthy? First, she doesn’t go to bed late. We students need much sleep (睡眠) every day. Some students watch TV or play computer games in the evening, so they go to bed late. It’s not a good habit.

Second, Li Yun eats all the food. My sister only likes to eat vegetables, because she doesn’t want to be fat. This is not healthy. But Li Yun is not fat, she eats meat and vegetables. A healthy eating habit is really useful.

Third, she is a happy girl. We all have some difficult time. But you can always see her smile (微笑). That is the key to be a nice and happy student. It also helps her keep healthy.

Let’s go to bed early (早), eat healthy food and be happy and healthy students!

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