renal failure cast

例句：

1. 1.He was diagnosed with renal failure and had to start living on a liquid diet.
   他被诊断出患有肾衰竭，不得不开始吃流质饮食。
2. 2. The patient's condition worsened, and he was admitted to the hospital for further treatment of renal failure.
   患者的病情恶化了，被送往医院接受进一步治疗肾衰竭。
3. 3. After several months of treatment, his renal function improved significantly, and he was able to return to normal activities.
   经过几个月的治疗，他的肾功能显著改善，能够恢复正常活动。