Objective: To compare the difference between enteral nutrition(EN) and parenteral nutrition(PN) on nutritional and immunal status and endurance of elderly patients with gastroenteral tumour.

• 目的:比较肠内营养(EN)与肠外营养(PN)对老年胃肠肿瘤病人营养免疫状况的影响及耐受性。