青光眼（）
A.月经期发作频繁
B.头痛伴剧烈呕吐
C.头痛伴视力障碍
D.头痛伴癫痫发作
E.头痛伴神经功能紊乱者
参考答案：C
_____ his letter, I decided to write to him again
A．Receiving not
B．Not receiving
C．Having not receiving
D．Not having received
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
