—I missed the first part of the film. It was really a pity.

—You __________ home half an hour earlier.

A．should go

B．must have gone

C．should leave

D．should have left

下列不属于社会卫生策略与措施的是（）

A.社区卫生服务

B.供应安全饮用水

C.医疗技术措施

D.合理配置卫生资源

E.突发公共卫生应急机制