treatment aiming at its root causes

例句：

1. 1. The patient wasgiven a treatment for his chronic pain.
   病人接受了慢性疼痛的治疗。
2. 2. The doctor prescribed thepatient a treatment to relieve his symptoms.
   医生给病人开了药来缓解他的症状。
3. 3.The new drug is a promising treatment forcancer patients.
   这种新药是癌症患者有希望的治疗方法。