张孝是位德高望重的老教授,今年75岁,平日生活很有规律,也非常注意饮食结构与养生之道。可不知为什么,近来发生了便秘。医生详细询问之下,方知张老过分注意自己的排便规律,把一天一次按时排便当作证实健康的一种方式,偶有排便延迟便误认为是“便秘”而服用泻药。由于泻药常使结肠过度排空,可使下一次排便反射推迟形成,并继续服药,随着结肠功能的紊乱和直肠反 Zhang Xiao is a respected old professor, 75 years old this week, a very regular life, but also pay great attention to diet and health regimen. I do not know why, recent constipation occurred. Under the doctor’s detailed inquiry, Fang Zhizao paid too much attention to his own law of defecation and took defecation on time as a way of confirming his health. Sometimes his defecation was mistaken for “constipation” and taking laxatives. Since laxatives often cause excessive emptying of the colon, the next defecation reflex can be postponed, and medication continues. As the function of the colon changes and the rectum