Questions 19 to 21 are based on the conversation you have just heard.

A．He tries to make the man’s dating successful.

B．He wants to divide the couple.

C．He remind the man where they were meeting.

D．He means to bring the couple closer.

骶髂关节及胸背部疼痛，晨起时脊柱僵硬的症状符合（）

A.脉管炎

B.腰椎间盘突出症

C.腰椎管狭窄症

D.坐骨神经炎

E.强直性脊椎炎