1 sentence for 症 (zhēng — sticking point)

1. 只要查明了问题的症结，解决起来就不难了。

   zhǐ​yào chá​míng le wèn​tí de zhēng jié, jiě​jué qi​lai jiù bù nán le.

   Once the crux of the problem is identified, it won't be hard to solve.

   Source: Dong Chinese Dictionary