If there were no hungry problem, the people of the world should have ________ in their daily life.

A．a much happier time

B．a more happier time

C．the happier time

D．much happiest time

进行病因推断时，下列哪一条不加考虑（）

A.联系的强度

B.剂量反应关系

C.对联系进行统计学检验所得P值的大小

D.因果关系的时间顺序

E.研究中病因的量与发病率的量有相关关系