患者，男，45岁。昨晚餐后出现脐周阵发性疼痛，并有腹胀、呕吐、肛门停止排便排气。患者主诉去年曾行“阑尾切除术”。诊断为单纯性粘连性肠梗阻。该患者非手术治疗期间，出现下列哪一项腹痛性质改变，提示发生绞窄性肠梗阻（）

A.阵发性腹痛

B.持续性腹痛，阵发性加剧

C.持续性胀痛

D.钻顶样绞痛

E.腹痛突然减轻

— I wonder _____.

— I'm afraid we'll be late. [ ]

A. how we can be on time

B. what we are going to do

C. why we get to school late

D. if we will arrive at the meeting on time