— Was the guest's speech interesting?

— Not at all. He was at a _____ and didn't know what to say when others asked him questions. [ ]

A. loss

B. relief

C. goal

D. mercy

颈部囊状淋巴管瘤的临床特点为（）

A.位于颈部正中线，指压可变形

B.位于颈部正中线，随伸缩舌上下活动

C.位于气管前，透光试验阳性

D.位于颈侧部，透光试验阳性

E.位于颈侧方，随吞咽上下活动