[单项选择]一病人，患绞窄性肠梗阻，行肠切除肠管吻合术，切除肠管前，用纱布垫保护周围组织，目的是（）。
A. 避免损伤空腔脏器
B. 防止或减少污染
C. 防止水分蒸发过多
D. 防止术后胃扩张
E. 防止术后腹胀

Superstition is a difficult question. We cannot quite say that superstition in Britain is dead. Its history is both (76) long and too recent for that, and indeed you will find many relics of it in modern Britain. But they are only relics connected chiefly with vague notions of good luck and (77) luck. It is unlucky, for instance, to walk under a ladder, or to spill salt, or break a mirror, or to have (78) to do with number 13; whereas a horseshoe brings good (79) , and people jokingly "touch wood" (80) prevent the return of a past misfortune. There are still many strange country remedies against sickness (81) are obviously superstitious. But the real measure of superstition is fear. In this (82) there is no superstition in Britain. British people as a whole do (83) believe in evil influences or evil spirits. Sickness and misfortune are not the (84) of witchcraft, but of dirt o