【单选题】
就是说,人要有自知之明,处世做人,要量力而行,不强求自己能力以外的物事。
A.
In other words, one must know his limits and act accordingly without straining and coveting what is beyond him.
B.
That is to say: we should have self-knowledge, carry out duties within our power, and give up the unrealistic longings for the impossible.