The reason ______ the delay is ______ we have had difficulty in obtaining materials.

A．for;that

B．for;because

C．to;that

D．to;because

体现医学道德和卫生法律义务的（）

A.医生对自杀的病人予以制止

B.医生的行为以保护病人利益、促进病人健康、增进其幸福为目的

C.医生要保护病人的隐私

D.医生的行为要遵循医德规范的要求

E.医生在紧急灾难（如传染病流行）面前要服从卫生部门调遣