一针见血

一针见血，成语，出自南朝·宋·范晔《后汉书·郭玉传》。本义; 一针刺下去就见到血,形容医生医术十分高明。现在多比喻说话直截了当，切中要害。【英译】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