go right to the heart of a matter 一针见血

“一针见血”，汉语成语，字面意思是“一针刺下去就见到血（let blood with a single prick of the needle）”。比喻文章、说话直截了当，切中要害。可以翻译为“go right to the heart of a matter，hit the nail on the head”。

例句：

你最后的意见真是一针见血。

The last observation of yours has hit the nail on the head.

她的文章确实一针见血。

Her articles certainly don't pull any punches.