From the central point of view, decide the choice of paper materials, and discard materials that have nothing to do with the theme or have little to do with it without regret, although these materials are all collected by yourself. If you lose something, you can gain something.
The central argument is the author's most basic view of the problem under discussion. It is the most important ideological viewpoint put forward by the author in the article, and it is a high generalization and concentration of all arguments.