患者,女性,41岁,阵发性腹痛、腹胀、呕吐、肛门停止排气1d,诊断粘连性肠梗阻。能减轻腹张、改善肠壁血液循环的措施是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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