4 sentences

1. 他的演讲简短且切中要害。

   tā de yǎn​jiǎng jiǎn​duǎn qiě qiè​zhòng yào​hài.

   His speech was short and to the point.

   Source: Tatoeba

2. 他的话切中了问题的要害。

   tā de huà qiè​zhòng le wèn​tí de yào​hài.

   His words hit the heart of the matter.

   Source: Dong Chinese Dictionary

3. 他的分析正中要害，指出了计划中最大的问题。

   tā de fēn​xī zhèng​zhōng yào​hài, zhǐ​chū le jì​huà zhōng zuì dà de wèn​tí.

   His analysis hit the nail on the head, identifying the biggest problem with the plan.

   Source: Dong Chinese Dictionary

4. 这一箭正好射中了敌人的要害。

   zhè yī jiàn zhèng​hǎo shè​zhòng le dí​rén de yào​hài.

   This arrow hit the enemy's vital spot.

   Source: Dong Chinese Dictionary