We should have a healthy .

    Will it matter if you don't take your breakfast？A short time ago, a test was given in the United States. People of different ages, from 12 to 83, were asked to have a test. During the test, these people were given all kinds of breakfast, and sometimes they got no breakfast at all. Scientists wanted to see how. Well their bodies worked when they had eaten different kinds of breakfast.

    The results show that if a person eats right breakfasts, he or she will work better than the person who has no breakfast. If a student has fruit, eggs, bread and milk before going to school, he or she will learn more quickly and listen more carefully.

    The result is opposite to what some people think. Having no breakfast will not help you lose weight. This is because people become so hungry at noon that they eat too much for lunch. They will gain weight instead of losing it. You will lose more weight if you reduce your other meals.

    Wang Yan, a 15-year-old Chinese girl, likes eating snacks very much. She prefers cream biscuits, McDonald's hamburgers and KFC chicken. As a result, she has become overweight.

    Today in China, there are many children like Wang Yan. Health experts say children should have healthy eating habits. First, they must eat regular meals and begin with a healthy breakfast. Second, they should have different kinds of foods such as fruit, vegetables, grain, eggs, milk and meat. Third, children shouldn't eat too much junk food. It is delicious, but eating it often is bad for their health. If children do as the experts say, they won't become overweight. They will be healthier. Students won't become tired at school, and they will have enough energy to study hard.

    It is a cold and dry winter morning. When you wake up, you feel that your throat hurts. You begin to sneeze and later you may cough. You must have a cold！Wait a moment. Could it just be a common cold or the flu(流感)that's been going around？

    A cold gives you a runny nose and cough. But it's usually easy to deal with. Some people take medicine while others drink herbal tea or chicken soup. Usually you feel better after a week.

    On the other hand, the flu can be much more dangerous. It usually gives you fever. Sometimes it can cause death. According to an American magazine, the worst flu killed about 50 million people from 1918 to 1919.

    Don't worry. If you get a flu vaccine(疫苗), it can stop you from getting the virus(病毒).Flu vaccines work by giving the body a small number of flu viruses. This causes your body to develop antibodies(抗体). So next time you get the flu, the antibodies will help you.

    The flu virus changes every few years. Therefore, there are so many types of flu, such as HlN1 and H5N1.The antibodies for one type of flu can't help us against all types of flu. That's why we need to get the vaccine every year.

    However, good healthy habits may also help stop you developing a cold or flu. Washing your hands often helps stop you from getting viruses. It is also important to get regular exercise and eat healthy food. All these can help you strengthen(增强)your immune system(免疫系统).