— Why not go out to have a tea over the break?

— _______.[ ]

A. No. I haven't got any change                

B. No. I'm really not in the mood    

C. No. I'm not thirsty                        

D. No. It's my treat this time

老年人服用地高辛生效变慢是因为

A．胃pH升高，离子型药物增多
B．胃pH升高，转化率变慢
C．胃排空速度减慢
D．肠排空速度加快
E．肝血流量减少，首过效应减弱