这种方法不仅可以表达文献的主题内容，而且还能表达其所含知识。
It can not only express the subject content of documents, but also the knowledge contained.
所以列出的参考文献必须与论文的主题相关联。
All references given must be referred to in the main body of the thesis.
结果：通过检索发现在这一主题下没有证据水平为I或II的文献。
Results. There were no Level I or II evidence on this topic with our search.
而且也有深入的相关文献阅读清单，可供本主题作进一步的研究用。
Also, there is an in-depth reading list, for further research into the topic.
而且也有深入的相关文献阅读清单，可供本主题作进一步的研究用。
Also, there is an in-depth reading list, for further research into the topic.
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