serum calcium

例句：

1. 1.The doctor prescribed a high dose of vitamin D to treat his bone problems.
   医生开了高剂量的维生素D来治疗他的骨病。
2. 2. The patient's blood tests showed an elevated level of serum calcium.
   患者的血液测试显示血清钙水平升高。
3. 3.The researcher found that the diet rich in calcium could help prevent osteoporosis.
   研究者发现富含钙的饮食可以帮助预防骨质疏松症。