cholesterol calculus

例句：

1. 1. The doctor diagnosed him with a cholesterol gallstone, which required surgery.
   医生诊断他患有胆固醇结石，需要手术。
2. 2.The patient was advised to follow a low-cholesterol diet to reduce the risk of developing gallstones.
   患者被建议遵循低胆固醇饮食以减少患胆结石的风险。
3. 3. Cholesterol gallstones can cause severe pain and complications during their formation.
   胆固醇结石在形成过程中可能会导致剧烈疼痛和并发症。