血晶质

例句：

1. 1. The doctor found a blood crystal in the patient's urine sample.
   医生在患者的尿样中发现了一个血液结晶。
2. 2. Blood crystals are used to detect trace amounts of drugs in the body.
   血液结晶用于检测体内微量药物的存在。
3. 3. The study found that blood crystals could be used as a diagnostic tool for certain diseases.
   研究发现，血液结晶可以作为某些疾病的诊断工具。