Studying Abroad 课文结构分析/text structure analysis

In Passage A, we have identified a paragraph structure as a general statement supported by some reasons just as in Paragraphs 8 and 9. 
    It is very common for a paragraph to start with a general statement or a general point but there are different ways to develop the paragraph. From our earlier analysis we found that a general statement or point might be supported by some details, examples, a list of items and, this time, the general statement is supported by some reasons. It just depends on what the writer wants to express. For a general statement supported by details, the writer might wish to tell us some views about the general statement. For a general statement supported by examples, the writer might hope to convince us of the point that has been made. For a general statement supported by a list of items, the writer might want us to learn more about the general point. And for a general statement supported by reasons, the writer might feel there is a reason to let the readers know why it is as expressed in the general statement.