凡是下消化道出血病例，均有结肠镜检查的适应证，但在急性大出血时宜暂缓施行，由于肠腔内大量积血，可影响结肠镜的检查和观察。()
参考答案：对
如何控制反应器藏量？
If you ______ earlier, you ________ him.
A．came; would meet
B．had come; would have met
C．had come; would meet
D．would come; met
