Daily Chinese Idiom Guessing Game
To hit the nail on the head; to pinpoint the issue with a single, sharp remark.
比喻说话直截了当，切中要害。
毛泽东《反对党八股》这不是把我们的毛病讲得一针见血么？不错，党八股中中国有，外国也有，可见是通病。”
Her comment about the project's flaw was one needle seeing the blood.