审题和构思：

文章的前两段给出了段首句，要续写成段；第三段要接着一、二两段写下去，从而得出结论。

该题第一段段首句所包含的信息是“people, interest, physical exercises”,其中体现段落中心的关键词是“physical

exercises”。因此，紧扣这几个词所体现的主题展开段落，可以围绕这样一个思路，即“what types of physical exercises

these people are interested in”来续写。

第二段段首句中的信息是what,eat,affect,health。其中关键词是what people eat即food。围绕这个词展开段落，可以写吃什么样的东西对身体会产生有益或有害的影响。少吃对人体容易造成危害的东西。

第三段的段首句没有给，只给了结尾句。这时把前两段的段首句和第三段的结尾句连系起来思考，仔细分析全篇文章展开的范围和趋势，就可以推出省略的段首句所包含的内容自然应是保持健康的第三种方法。

段落提纲：

A. These people are interested in physical exercises.

a. types of physical exercises

b. effective results

B. Medical researchers have proved that what people eat affects their health.

a.kinds of food

b. forceful reasons

C. Getting rid of bad habits like smoking and drinking alcohol is also an important way to keep healthy.

D. Conclusion of the whole composition

范文：

How to Keep Healthy

Nowadays more and more people are concerned about their health.

These people are interested in physical exercises. If you happen to be in one of the city parks early in the morning,you will see lots of people there. Some are practising taijiquan and swordplay and others are either running,walking or exercising through dance.Researches show that getting plenty of exercise makes the heart beat faster and the lungs work harder, thus strengthening the heart and reducing the chance of heart attack, and helping to lower blood pressure.

Medical researchers have proved that what people eat affects their health.They advise people to eat more fruits and vegetables and less red meat like beef and pork because red meats contain more fat than poultry and fish. Fats can build up in the arteries,block the flow of blood,and cause a heart attack or stroke.

Getting rid of bad habits like smoking and drinking alcohol is also an important way to keep healthy, but it still fails to draw enough people's attention. If people pay equal attention to the above mentioned three ways of keeping fit,they will greatly improve their health.

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