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【单选题】
患者男性，21岁，因便血1，反复神志障碍2天入院。1年前经双气囊小肠镜检查诊断为小肠克罗恩病。查体：血压95/45mmHg，心率138／分钟，体温36.8℃，呼吸22/分钟。神志模糊，稍烦躁，消瘦体型，营养差，全身皮肤黏膜苍白，湿冷，末梢发绀明显。肠鸣音活跃，肛门可见大量血性液体和血块排出。白细胞2.77×10 9 ／L；红细胞2.67×10 12 ／L；血红蛋白78g/L。入院后急诊行腹腔血管造影术，提示肠系膜动脉空肠支破裂出血，将空肠支栓塞处理。现患者轻微腹胀感，肠鸣音2／分钟，无恶心、呕吐，解大便1次，量正常，隐血阴性。当前患者营养支持原则为（）
A.
继续肠外营养支持，等待腹部情况完全好转
B.
试用肠内营养，逐渐减少肠外营养用量
C.
中心静脉营养向周围静脉营养转换
D.
停止使用肠外营养
E.
静脉补充葡萄糖和电解质，并进行肠内营养
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