毛细血管内血液流速比小动脉慢，主要原因是（）
A.口径小
B.阻力大
C.血压低
D.可扩性小
E.总横截面积大
参考答案：E
正常注水井发现注水量超出允许误差，应在（）内进行分析整改。
A、一周
B、二周
C、五天
D、十天
The nurse is providing care for a postoperative client who has undergone a small bowel resection. The nurse may use an epidural catheter for which of the following（）
A. Antibiotic therapy.
B. Pain management.
C. Blood transfusion.
D. Anticoagulation.
