题干： 男性，42岁，便秘2年余，1周余前排便时出现肛门烧灼样痛，便后可缓解，之后又可再次出现疼痛，便纸上可见少量血迹。 其最可能的诊断为
A. 痔
B. 肛瘘
C. 肛裂
D. 肛周脓肿
E. 直肠癌
查看答案
Gamma rays used to irradiate food ___.
A. are generally not strong enough to destroy contaminating organisms
B. do not bring about significant changes in the food itself
C. may destroy some of the nutrients in the food
D. should be submitted to FDA for approval
题干：女性，63岁，因上腹隐痛并黏液血便4个月余入院，查体上腹部可扪及肿块。X线钡剂灌肠示横结肠靠近脾曲处充盈缺损。 其最可能的诊断为
A. 结肠息肉
B. 横结肠癌
C. 溃疡性结肠炎
D. 肠阿米巴
E. Crohn病
With cases of food poisoning increasing, ___.
A. food irradiation should be carried out with care
B. it is more urgent to irradiate foods
C. medical researches into treatment of the diseased should be strengthened
D. Americans are beginning to accept food irradiation
The passage may be taken from ___.
A. a news report
B. a textbook of food processing
C. a book of popular science
D. a manual of food irradiation
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