本论文主要用了文献分析法和思辨法。文献分析法是指通过对收集到的某方面的

This paper mainly uses literature analysis and speculation. The literature analysis method refers to the analysis method of exploring the nature and condition of the research object by studying the collected literature materials in a certain aspect, and deriving his own opinion from it.

This paper mainly uses the method of literature analysis and the method of thinking. The method of literature analysis refers to the analysis method by studying the literature collected in some aspect stoic, in order to find out the nature and condition of the research object, and to draw its own point of view from it.

This paper mainly uses the methods of literature analysis and speculation. Literature analysis refers to the analysis method of finding out the nature and status of the research object and drawing out their own views from the collected literature.<br>