Research methods: document and material method, surveying method, and questionairemethod.
研究方法：文献资料法、调查法、问卷法。
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This paper adopts the questionairemethod to analyse the subjective factors that affect students' English language learning.
本文采用问卷调查的方法，对影响学生英语学习的主观因素做了较为全面的分析。
3
Methods 5307 health examination professionals and 2000 patients in hospital were studied by questionairemethod. HBV was detected by ELISA and data were treated statistically by SAS software.