Mrs. King has ____ China for over three years. [ ]

A. gone to

B. been to

C. come to

D. been in

下列哪几项检查可以诊断急性胃黏膜损害（）

A.酶学检查

B.X线检查

C.根据临床表现

D.急诊胃镜检查

E.胃液分析