To observe the effect of early enteral nutrition (EEN) on intestinal barrier function after the gastrointestinal surgery.

观察早期肠内营养（EEN）对胃肠道手术后肠屏障功能的影响。

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Objective: to study the feasibility and clinical effects of early postoperative enteral nutrition support after gastrointestinal surgery.

目的：探讨胃肠手术后早期肠内营养的可行性及临床效果。

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Objective To discuss the clinical effect of hypocaloric and lower nitrogen parenteral nutrition on patients after surgery of gastrointestinal malignancy.

目的探讨胃肠道恶性肿瘤切除术后行低氮低热量肠外营养的临床效果。

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