chololith

例句：

1. 1. He had a calculus in his kidney that required surgery.
   他的肾脏里有一块结石，需要手术。
2. 2.The doctor advised him to take medication for the pain and reduce his salt intake.
   医生建议他服用药物以减轻疼痛并减少盐分摄入。
3. 3. The patient was given an X-ray to diagnose the cause of the calculus.
   患者被给予X光检查以诊断结石的原因。