结石学

例句：

1. 1. The doctor diagnosed him with a kidneystone.
   医生诊断他患有肾结石。
2. 2. Hewas advised to take more calcium and reducehis uric acid levels.
   他被建议增加钙的摄入并降低尿酸水平。
3. 3. Gout is a condition where uric acidcrystals form in the joints.
   痛风是一种尿酸晶体在关节形成的状况。