No student _________ go out of the school campus after ten o’clock at night without permission, according to the school regulations.

A．will

B．must

C．may

D．shall

与胃癌发生密切相关的因素不包括（）

A.存在胃溃疡、胃息肉等良性慢性疾病

B.萎缩性胃炎伴肠上皮化生

C.幽门螺杆菌感染

D.胃大部切除术后残胃黏膜反复发作慢性炎症

E.浅表性胃炎