男性，29岁，间歇性胃痛7年，多发生于空腹或夜间，进食或服制酸药可缓解。发作有季节性，常伴有反酸、嗳气。近来症状加重，伴有腹胀、呕吐，呕吐后症状可暂缓解。

某天夜间突然剧烈腹痛，检查腹部压痛、反跳痛和肌紧张，该患者腹痛原因是（）。

A.胃溃疡穿孔

B.急性胰腺炎

C.溃疡出血

D.急性糜烂出血性胃炎

E.十二指肠溃疡穿孔

The line of computing jobs waiting to be run on a computer system might be a ______. The jobs are serviced in the order of their arrival, that is, the first in is the first out.

A．queue

B．stack

C．array

D．record