血液学

例句：

1. 1. He was diagnosed with leukemia, which is a type of bloodcancer.
   他被诊断出患有白血病，这是一种血癌。
2. 2. Blood tests are an important partof the medical examination for many diseases.
   许多疾病的医学检查中，血液测试是非常重要的一部分。
3. 3. Blood transfusions are used toreplace lost blood during surgery or injury.
   输血用于在手术或受伤时替代失去的血液。