2 sentences

1. 医生的诊断非常对症，找出了病根。

   yī​shēng de zhěn​duàn fēi​cháng duì​zhèng, zhǎo​chū le bìng​gēn.

   The doctor's diagnosis was spot-on and identified the root cause.

   Source: Dong Chinese Dictionary

2. 治疗感冒时，一定要按照病症对症用药。

   zhì​liáo gǎn​mào shí, yī​dìng yào àn​zhào bìng​zhèng duì​zhèng yòng​yào.

   When treating a cold, be sure to use medication appropriate to the symptoms.

   Source: Dong Chinese Dictionary