--- Shall I go over to have a chat with you this evening?

--- Nice of you! It is ________ great comfort to keep me ________ company, when I’m alone at home.

A．a; the

B．/ ; a

C．a; /

D．the ; /

胆道蛔虫

A．剑突下阵发性钻顶样绞痛
B．右下腹痛，结肠充气试验阳性
C．上腹刀割样疼痛，板状腹
D．右上腹痛，墨菲征阳性
E．小儿腹痛，右下腹触及香肠样肿物