radical treatment in chronic case

例句：

1. 1. Radical treatment is often the only option for severe cases of cancer.
   对于严重的癌症病例，激进治疗通常是唯一的选择。
2. 2. The patient required radical treatment to save his life.
   患者需要激进治疗来挽救生命。
3. 3. Radical treatment involves removing all cancerous tissue from the body.
   激进治疗涉及从身体中移除所有癌组织。