— Shall we meet at a quarter to eight ?       

— That's too early. Let's _____ at half past eight.   [ ]

A. come at

B. go at

C. make it

D. leave at

11个月男婴。母乳喂养，迄今未加辅食，很少晒太阳，经常发生腹泻，查体：发育一般,方颅，鸡胸及肋骨串珠，心肺听诊正常，腹软，四肢肌肉较松弛。可伴有

A．血钙正常，血磷降低
B．血钙、磷均降低
C．血钙正常，血磷升高
D．血钙降低，血磷升高
E．血钙降低，血磷正常