目的比较间断喂养与持续喂养对危重症患者肌肉萎缩和营养状况的影响以及营养不耐受情况，为临床危重症患者选取更合适的营养支持方式......

Four-factor and three-level orthogonal experimental design(L9(34))was used in the experiment.The effects of three genoty......