单项选择题

A.Hb 100g/L,Hct 30%
B.Hb 80~90g/L,Hct 25%
C.Hb 70~80g/L,Hct 20%
D.Hb 60~70g/L。Hct 20%
E.Hb 50~60g/L,Hct 15%