2 . If you go to a fast-food restaurant, you will probably see a lot of teenagers. Today, many teenagers are overweight, and some of this is because of their bad eating habits. Most teenagers love food with a lot of fat, oil, salt and sugar. People often call this kind of food “junk food”.

But bad eating habits go beyond fast food. We find many teenagers eating unhealthily. Some don’t have breakfast before they go to school. During the day, some don’t have a right meal for lunch. In a recent survey at one school, scientists found that over 2/3 of the students didn’t follow a healthy diet. They didn’t like vegetables, and they didn’t like to eat fruit. They preferred to eat food with a lot of salt, sugar, or fat.

Parents today also worry about their children’s diet. Some doctors give the following advice:

★ Teenagers shouldn’t eat too much junk food.

★ Teenagers shouldn’t eat food with too much salt. Salt can cause high blood pressure（高血压）in the future.

★ Teenagers should eat food with less fat, oil, and sugar.

★ Teenagers need to eat some fruit and vegetables every day. Fruit and vegetables are rich in vitamins（维生素）and have little fat.

★ Teenagers need to drink more milk. Milk will help their bones grow.

★ Teenagers need to eat breakfast every day. This is good for their body and mind.

3 . ①It’s healthy to eat at home. But sometimes you just want to eat out. How can you have a delicious and healthy meal at the restaurant? The following ways can help you.

②Before you order, you’d better have a good look at the menu. There are all kinds of dishes（菜肴）on it. Have no idea what the dish is? Ask the waiter. Then you don’t need to eat any food you don’t like. It’s good for you to order some fish and vegetables.

③When you are enjoying your food, use a small plate and eat slowly. A small plate can help you eat less, but make you feel full quickly.

④After the meal, you may want a piece of cake for dessert. Stop! There is too much sugar in it. All you really need is some fruit. If there isn’t any fresh fruit at the restaurant, don’t order any more.

⑤It’s time to go home. Don’t take the bus or taxi. Take a walk please.

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5 . Cola is bad for our health. Why? Cola is sweet, because it has sugar (糖). Too much sugar can let us get fat. Drinking one bottle of cola each day can make us get fifteen pounds (磅), we can’t eat much healthy food, such as fruit.

Drink water, please. Water is very important to our body. It makes us feel good. We get water from ▲     . But we should also drink enough water every day. If you don’t like to drink water only, you can put a little fruit juice into it.

6 . Everybody knows that healthy eating habits are important. You may want to know whether your eating habits are healthy or not     1    

Drink enough water. Drink at least eight glasses of water a day.     2     It’s not good for your health. Have breakfast every day. Breakfast is the most important meal of a day.     3     Going to school without(没有) breakfast is bad for your health.

Eat a nutritious(有营养的) lunch. Eating a nice and nutritious lunch every day is important.     4    

Don’t eat dinner too late. Try to have dinner at least three hours before you go to bed.     5    

Eat fruit and vegetables. Fruit and vegetables are rich in vitamins. Add a banana to your breakfast, have lunch with salad, and eat some vegetables at dinner.

7 . “An apple a day keeps the doctor away.” Similarly, if we drink a little more water every day, we may find that we need to go to the doctor less often. A healthy diet is made up of water and different kinds of foods. We know that healthy foods like fruits, vegetables and fish, are important as they offer energy and fiber, without giving us much fat and sugar. But why is water important?

The human body needs water to survive. Water is important as it carries poisons and waste out of our bodies. However, doctors advise us to drink plenty of water, much more than the small amount we need to stay alive.

Some doctors believe that water is important for health in all kinds of ways. They believe that many illnesses and health problems appear as a result of dehydration—a lack of water. Most people are dehydrated at least some of time, although they probably don’t know it. It is surprising to learn that if we feel thirsty, we are already in the first stages of dehydration. In fact, we are advised to drink water before we feel thirsty.

These doctors think that health problems such as headaches, high blood pressure could be helped if people drink more water. They also believe that drinking more water can help people who are fat. Water contains no calories so it will not make us gain weight. If we drink water, we will probably drink less sugary soft drinks. Doctors also believe that drinking more water may stop people from overeating. They say that many people think that they are hungry when they are, in fact, thirsty. Doctors suggest, therefore, that we eat less food and drink more water.

There are still many health problems that cannot be solved by drinking water, so we should not stop going to see the doctors completely.

8 . You are probably familiar with the saying “An apple a day keeps the doctor away”. A piece of recent research by the Chinese University of Hong Kong may change the saying into “An apple a day may keep aging away”.

The research chose fruit flies (果蝇), as they share many genes (基因) with humans. The researchers either fed the fruit flies as usual or added apple extract (浓缩物) to their food.

It turned out that the fruit flies which fed on food with apple extract lived an average (平均) of 55 days – five days longer than the flies that were normally fed. The research group also found it easier for these flies to walk, climb and move about as they aged.

The scientists said that some dangerous chemicals in the flies’ bodies would cause illnesses and aging. But the antioxidants (抗氧化剂) in the apple extract helped clean them up.

The scientists also studied diets of thousands of women. They found that those who ate apples often were 20 percent less likely to have heart disease and strokes (中风).

Some scientists studied the apple’s genes. They are trying to grow special apples full of antioxidants. They believe the antioxidants would keep people from heart disease and even cancer.

9 . With labels such as “zero sugar, zero fat, zero calories'', diet drinks have been placed in places that are easily seen on supermarket shelves. But how do these drinks taste sweet without sugar?

One of China’s most popular drink brands, Genki Forest, apologized on April 10 for deceptively* advertising its products as having no sugar. In a statement, the fast-growing company said that the difference between “sugar-free” and “sucrose-free” was not well explained in the product advertising and packaging, leading to a “misunderstanding”.

Now the company has changed the words from “sugar-free” to “low sugar” on the bottles. But many internet users don’t buy the apology and feel like they’ve been tricked into gaining weight. The event has pushed “sugar-free” drinks to consumers’ attention.

In fact, there are many kinds of sugar. Sucrose is just one of them. Other kinds of sugar, such as fructose and sugar alcohol, are still in Genki Forest drinks. These types of sugars are used as sweeteners*. They offer little energy, but a small amount of them can make drinks taste sweet. That’s why diet drinks like Genki Forest are popular among people who want to lose weight.

However, these sweeteners might make people eat more. When you eat sweet-tasting things, it sends your brain a “sweet signal", which then tells your body to prepare itself to take in energy. But because diet soft drinks have little energy, the brain will not receive what it is expecting. In this situation, you will feel hungry and start eating more food to get energy, according to Chen Wei, chief physician of Clinical Nutrition Department of Peking Union Medical College Hospital.

According to China Daily, drinking too many diet drinks might lead to obesity*. “Compared with sugar-sweetened drinks, low-sugar drinks are helpful for preventing obesity, but compared with water, low-sugar drinks are not that healthy,” Chen told The Paper.

Heart disease is the leading cause of death for many people. Healthy eating is really important. How can you have a healthy diet? Here are five tips that are worth putting into use in your daily life.

The kind of fat in your diet really has to do with heart disease. If you’re a red meat lover, don't choose the animal meat with much fat. When you’re shopping for milk products like cheese and yogurt, choose those with less or no fat. And remember to use plant oils instead of butter in cooking.

Either of them can provide a great, number of good things for your body. If you’re afraid of too many calories (卡路里)，focus more on vegetables since they usually have less sugar than fruits do. Set a goal to eat one more serving than you do now! Then try to have five servings a day.

Nature provides important things like fiber (纤维) in foods to meet the needs of your body. There are also man-made foods to support your body with these important things. For example, some biscuits are advertised as rich in fiber. But do remember: nature provides the best.

Follow the saying “If it’s grown, eat it.” Simply prepared fresh food is always the best choice. Research shows that more than seventy-five percent of salt you eat is from boxed, bagged and specially prepared dried or frozen food. What’s worse, most of the bad fats which you need to avoid are also from them.

You should not only think about what you eat, but also how much you eat. Even the calories from healthy food can add up fast. So try using smaller plates and bowls, to fool your eyes as if you’re “seeing” a large part and add the pleasure of eating “the whole thing”.

Remember healthy eating is a long-term project, you need to follow the tips over time, not daily. Then your healthy diet will certainly support a healthy heart.