一针见血: pierce [get] to the truth with a single pertinent remark; draw blood with one prick; go straight [right] to the heart of the matter; hit the (right) nail on the head; make a pointed remark
精辟: (深刻; 透彻) penetrating; incisive 短语和例子进行精辟的分析 make a penetrating analysis; 精辟的论述 a brilliant exposition; 精辟的言词 incisive statement