Food supplies in the floodstricken area ________.  We must act immediately before there's none left.     [ ]

A. have run out                        

B. are running out    

C. have been run out                  

D. are being run out

男性，68岁。阵发性腹痛、腹胀，肛门停止排气、排便1天。6年前因急性坏疽性阑尾炎穿孔作过手术。

查体：腹胀明显，可见肠型，腹软，全腹稍压痛，无反跳痛，肠鸣音亢进，腹部平片示中下腹部小肠有多个气液平面。盲肠、升结肠均充气扩张。下述诊断哪项最有可能（）

A.麻痹性肠梗阻

B.高位小肠梗阻

C.低位小肠梗阻

D.结肠梗阻

E.绞窄性肠梗阻