A. 腹腔未放置引流 B. 十二指肠残端关闭不严 C. 胃切除过多 D. 胃肠减压失效
A. DABC B. DBCA C. DACB D. CADB
A. served B. removed C. shared D. offered
A. Even so B. In addition C. Instead D. Therefore