A:I've puzzled my brains about how to teach the children.

A:教育孩子的事真让我大伤脑筋。

B:What's your problem?

B：你怎么了?

A:My children can never be obedient even if I criticize them severely.

A:即使我严肃地批评我的孩子，他们也从不听话。

B:You need not always do that. Why don't you pat them on the back occasionally?

B：你不必总那么做，你何不偶尔也鼓励赞美他们一番呢?