A.≥100×109/L B.(75~99)×109/L C.(50~74)×109/L D.(25~49)×109/L E.<25×109/L
A.≥4.0×109/L B.(3.0~3.9)×109/L C.(2.0~2.9)×109/L D.(1.0~1.9)×109/L E.<1.0×109/L