不完善的

An indistinct idea he had, that the child was desolate and in want of help.

他心里有一种模糊的概念，就是这孩子是无人照顾的，需要帮助。

To accord with normal test and anova test, the compare between two groups with T-test, the compare between before and after oneself with Paired comparison.

符合正态性检验和方差齐性检验，两组间比较用t检验，自身前后变化比较用配对t检验。