help a lame dog over a stile 雪中送炭；助人于危难；助人渡过难关

【例句】
I don't believe he minds much about what you do as long as you help a lame dog over a stile.
我相信只要你是帮人渡过难关，他就不会太介意你所做的事。

He would always help a lame dog over a stile, that was his boast.
他总是对有困难的人帮一把，这是他引以为豪的事。