单项选择题
A.MCV正常,RDW增高 B.MCV增大,RDW正常 C.MCV减少,RDW增高 D.MCV、RDW均正常 E.MCV、RDW均增高
A.米泔样便 B.蛋花样便 C.脓血便 D.果酱样便 E.鲜血便