关于胎儿期保健，下列哪些是不正确的（）

A.孕母可接触放射线

B.胎儿期应监测胎儿的发育为主

C.应以孕母保健为主

D.孕母不必补充微量营养元素

E.产妇不必定期产前检查

When the young man realized that the police had spotted him, he made （） the exit as quickly as possible, only to find that two policemen were waiting outside.

A．off

B．from

C．towards

D．for