The main research methods of this thesis are documentation method and questionnaires method.

本论文主要采用的方法是文献研究法和问卷调查法。

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Documentation method, questionnaire method, statistical method, comparison method and interviewing method are adopted in the course of my research.

在研究过程中，主要采用文献法、问卷调查法、统计法、比较法、访谈法。

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The main research methods of this paper include: documentation method, case analysis, Field Observation, logic analysis and Mathematical statistics and other methods.

本文主要运用文献资料法、案例分析法、实地观察法、逻辑分析法以及数理统计法等研究方法。

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