1.身边的例子
2.要坚持下去，不能半途而废
3.叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述叙述
4.
ttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
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