Methods By using a self-designed questionnaire, 2 741 students in No. 31 middle schools were investigated.
方法采用自行设计的调查问卷，对沈阳市第三十一中学2 741名学生进行问卷调查。
An anonymous investigation was conducted about school bullying, in which 481 pupils answered a self-designed questionnaire.
用自编欺负行为问卷，采用匿名报告方式调查了481名小学生。
Methods 220 nurses and 200 patients were investigated using a self-designed questionnaire, with reference to a lot of recent related articles.
方法参考大量文献，采用自行设计的问卷对220例护士和200例患者进行问卷调查。
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