Many scientists say that it's important for us to have ______ food in our diet.   [ ]

A. a variety of    

B. a great deal  

C. a large number of  

D. a good many

25岁妇女，平时月经规则，现停经48天，恶心呕吐10天。下列哪些处理是必须做的（）

A.血或尿的HCG检查

B.超声检查除外异位妊娠

C.解除思想负担

D.嘱清淡饮食

E.血甲胎蛋白检查