blood platelet

例句：

1. 1.He was diagnosed with a blood disorder that required frequent blood transfusions.
   他被诊断出患有一种需要频繁输血的血病。
2. 2.Blood tests are used to diagnose and monitor diseases in the body.
   血液测试用于诊断和监测体内的疾病。
3. 3. The doctor explained that platelets play a crucial role in clotting blood.
   医生解释说血小板在凝血过程中起着至关重要的作用。