4个月时小儿的胎儿型血红蛋白（HbF）为（）。
A.<1%
B.<2%
C.<5%
D.<10%
E.<20%
参考答案：E
The children loved their day trip, and they enjoyed the horse ride___
A．most
B．more
C．less
D．little
脾虚肾虚大便的特点是()
A.泻下黄糜
B.完谷不化
C.泻下腐臭
D.溏结不调
E.便下脓血
