The first part of elaboration selected topic significance, which contains the fundamental research achievement and the thinking of this article.
第一部分阐述选题意义，包含已有理论研究成果及本文研究思路。
403 undergraduates were selected to report achievement motivation, self-esteem, trait anxiety, depression, loneliness and problem-behaviors.
采用成就动机、自尊、特质焦虑、抑郁、孤独四个量表及问题行为问卷对403名大学生进行测查。
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