·2,447,543篇论文数据，部分数据来源于NoteExpress
RESULTS: Totally 150 questionnaires were sent out, 121 were effectively received with effective recovery of 80.67%, and the reliability and validity of the designed questionnaires were good.
结果：共发放问卷150份，回收有效问卷121份，有效回收率为80.67%。所设计的调查问卷信度、效度均良好。
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