The main study instrument was the open and closed-ended questionnaire, and the following interview was also employed to gain some in-depth and supplementary data.
调查工具主要采用问卷，随后对学生访谈来获取深层信息以对定量数据进行补充。
The main study instrument was the open and closed-ended questionnaire, and the following interview was also employed to gain some in-depth and supplementary data.
调查工具主要采用问卷，随后对学生访谈来获取深层信息以对定量数据进行补充。
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