For me, it is her face and hands, I think they are really expressive, and also, they make the woman seem very contemplative, seems like she is thinking pretty seriously about something.

"对我来说，我觉得是她的手和脸，我觉得这两个地方描绘的非常具有表现力，并且使得这位女性栩栩如生，使得我们感觉她在思考一个非常严肃的事情。