—________ will you stay in Shenzhen for your summer vacation?

—For about two weeks.

A．How far

B．How often

C．How soon

D．How long

下列哪项是异位妊娠的超声表现（）

A.附件区显示形状不规则包块

B.宫腔空虚

C.直肠子宫陷凹有积液

D.官旁包块内可见妊娠囊

E.以上都是