The air is fresh outside. Let's go and take a walk, ______?[ ]

A. will you

B. shall we

C. don't you

D. aren't you

胃溃疡的直接征象是（）

A.痉挛性切迹

B.空腹潴留液

C.蠕动减弱

D.龛影

E.充盈缺损