填空题 Chemists have been studying why people cry. They say the body produces two kinds of tears. One kind cleans out the eye if it gets dirt in it. But when people cry because of their feelings, these tears have poison chemicals in them. The body is getting rid of chemicals produced by strong feelings.
In the United States men have heart diseases more often than women do. Doctors say heart disease and some other diseases are related to the pressures (压力) of living and working in a modern society. Perhaps men suffer more from these diseases because they do not cry enough. And it is possible that as more and more women work outside the home, they will also suffer from more pressure. Then everyone will need to cry more.

填空题 How many kinds of tears does the body produce?

填空题 What do the tears contain, when people cry because of their feelings? They contain ______.

填空题 Living in a modern society, what kind of disease is common among people?

填空题 Why do men suffer more from these diseases than women? Probably because they do not ______.

填空题 What will happen if more and more women suffer from more pressure? They will need to ______.