answer: #Person2# says Americans can have as many children as they want but some refuse because they prefer working or traveling or refuse to bring children into a difficult environment. #Person1# says Chinese still want as many as possible.
documents: #Person1#: I notice an article in the newspaper about the problem of rapid growth of cities in America. I was wondering do you Americans carry out a birth control policy? Can Americans have as many children as they want?
  #Person2#: Yes, sir. We can have as many as we want, but most people decide to have only one or 2, and some people decide not to have any.
  #Person1#: Why do they decide not to have any? In the old days, we Chinese always wanted to have as many as possible. Some still do now.
  #Person2#: And some people prefer to devote all their energy to their work or to seek their own interests and travel. Another sees so many problems in the world that they refused to bring children into such a difficult environment.
  #Person1#: It's understandable.