—Do you know why the sun looks much bigger on the horizon?

—Well, well,         .I have never read about that.

A．that depends

B．I can’t tell you

C．there is some doubt

D．you really have me there

积证具有无积块，腹中气时聚时散，发有休止，痛无定处，病程较短，一般病情较轻，治疗较易等特点。