I walked on, glad to have helped someone, to have done something active for once.

我接着走，心里因帮助了别人并第一次主动做了点事情而感到高兴。

And Dr. Reeves explains that Sarah's sister, Anne, is his student and she had asked him " to lend her a hand." " To lend someone a hand" means to help someone, to give someone some assistance.

里夫斯博士解释说， 莎拉的妹妹安妮是他的学生， 她曾请求他“帮她一把” 。“伸出援助之手” 的意思是帮助某人， 给某人一些帮助。