section_ⅰ welcome to the unit & reading — prereading
1．which kind of food can we eat to keep fit in everyday life?
2．what will happen if you are caught in a little amount of sleep?
拥有健康的身体是一个人最大的财富。那么，在平时我们需要注意哪些问题呢？一起来听听健康专家的建议吧。
good health is the most valuable possession (财富) a person can have, but one can't take health for granted. there are three things that a person can do to help stay in good shape: eat the right foods, get enough sleep, and exercise regularly.
proper nutrition (营养) is important for good health. your body cannot function well unless it receives the proper kind of “fuel”. avoid foods with lots of sugar and fat. eat plenty of foods that are high in protein (蛋白质), like lean meat, fish, beans, and nuts. vegetables and fruits are especially important because they provide necessary vitamins and minerals. however, don't overeat. it is not healthy to be overweight.
getting the proper amount of sleep is also important. if you don't get enough sleep, you will feel tired and have no energy. over a long period of time, a little amount of sleep may even result in a change of personality. be sure to allow yourself seven to nine hours of sleep each night. if you do, your body will feel strong, and your mind will be sharp.
