The reason for the hospital: black stools account for 66.7%, average blood pressure: 101.7 ± 20.6 mmHg, pulse average: 94.2 ± 10.8 l / p, clinical symptoms mainly defecate of blood accounted for 97%, average 23.4 ± 7.4 Hct, Hb average: 8 ± 2.4 g / dl, the number of units transfused average: 5.7 ± 4 units of blood, causes: 20 cases of small bowel tumors (56%), 2 cases of aneurysm (6%), 11 cases of small bowel ulcers (30%), unspecified 3 cases (8%).