血球素

例句：

1. 1. Blood tests can help detect the presence of blood cells in the body.
   血液测试可以帮助检测身体内是否存在血细胞。
2. 2. The doctor ordered a transfusion to replace the lost blood cells.
   医生下令输血以替代失去的血细胞。
3. 3. He was given an injection to boost his immune system and increase the number of blood cells in his body.
   他接受了注射来增强他的免疫系统并增加他体内的血细胞数量。