—It often rains in that area.Please take an umbrella with you.

—________.

A．Well, it just depends

B．All right，you're welcome

C．Yes, take it with me

D．OK，just in case

动静脉瘘的超声表现不包括

A．瘘道近端动静脉管径明显增宽

B．创伤性动静脉瘘可直接显示瘘道

C．瘘口处可见五彩镶嵌血流

D．瘘道远端动脉血流速度减慢，频带变窄

E．静脉内出现动脉化血流频谱