— People should start using public transport instead of using their private cars.

— _________ . The streets in Shandong are too crowded as it is in Jinan.

A．All right

B．Exactly

C．Go ahead

D．Fine

一足月顺产新生儿，生后3小时吐血及血便约100ml查体，一般情况好，面色红，血常规检查示血红蛋白190g/L，RBC5.5×10¹²/L

最能明确诊断的检查是（）

A.定血型

B.Apt试验

C.腹部X线摄片

D.同位素检查

E.B超