一男子，病泄十余年。豆蔻、阿胶、诃子、龙骨、枯矾，皆用之矣。中脘、脐下、三里
，岁岁灸之。皮肉皴槁，神昏足肿，泄如泔水，日夜无度。戴人诊其两手脉，沉且微，曰∶
生也。病患忽曰∶羊肝生可食乎？戴人应声曰∶羊肝止泄，尤宜服。病患悦而食一小盏许
，可以浆粥送之。病患饮粥数口，几半升，续又食羊肝（生）一盏许，次日泄几七分。如此月余
安。此皆忌口太过之罪也。
戴人常曰∶胃为水谷之海，不可虚怯，虚怯则百邪皆入矣。或思
荤茹，虽与病相反，亦令少食，图引浆粥，此权变之道也。若专以淡粥责之，则病患不悦而
食减，久则病增损命，世俗误人矣。
戴人常曰∶脏毒酒毒；下血呕血；妇人三十以下血闭；六月七月间脓血恶痢
，疼痛不止；妇人初得孕择食者，以上皆不忌口。
戴人常曰∶人言我不接众工。戴人曰∶余岂不欲接人，但道不同，不相为
谋。医之善，惟《素问》一经为祖。有平生不识其面者，有看其文，不知其义者，此等虽曰相亲，欲何
说？止不过求一、二药方而已矣。大凡药方，前人所以立法，病有百变，岂可执方？设于富贵之
家病者，数工同治，戴人必不能从众工，众工亦不能从戴人，以此常孤。惟书生高士，推者
复来，日不离门。戴人又曰∶我之术，止可以教，书生不能受医者忽授老书生曰∶我是书
生，岂不知书生？书生固多许可，以易慢。戴人问之，曰∶彼未尝见予治病，故有是言。若亲
见予治病数十人，自反思矣。凡谤我者，皆望风取信于群医之口也。孔子曰∶浸润之谮，肤
之HT ，不行焉。可谓明也已矣。
一个男子，患腹泻病十多年。豆蔻、阿胶、诃子、龙骨、枯矾等药，都用过了。中脘穴、脐下部位、足三里穴，每年都在施灸。导致皮肤肌肉干瘪皱缩，神志昏沉，双脚浮肿，泻下物像米泔水一样，日夜没有节制。戴人（张从正）诊察他的两手脉象，沉且微弱，说：“还能活。”病人忽然问：“生羊肝可以吃吗？”戴人随即回答：“羊肝能止住腹泻，尤其适合服用。”病人很高兴地吃了一小盏左右，可以用米汤送服。病人喝了几口米汤，将近半升，接着又吃了一小盏左右的生羊肝，第二天腹泻减少了十分之七。如此持续一个多月后痊愈。这都是因为忌口太过分造成的过错。
戴人常说：胃是水谷汇聚的大海，不能虚弱怯弱，如果虚弱怯弱，那么各种邪气都会侵入。如果病人想吃荤腥蔬菜，虽然与病情看似相反，也应该让他少量食用，以此作为引导，促使他进食米汤粥类，这是权宜变通的方法。如果一味强迫只吃清淡的白粥，那么病人会不高兴而减少进食，时间久了会导致病情加重甚至损害生命，这是世俗之人误人的做法。
戴人常说：脏毒、酒毒引起的便血呕血；三十岁以下妇女的血闭经；六月七月间出现的脓血恶痢，疼痛不止；妇女刚怀孕时挑食的，以上这些情况都不需要严格忌口。
戴人说：人们说我不同一般的医生交往。戴人说：“我难道不想与人交往吗？只是道不同，不相为谋。医术的正统，只有《素问》这一部经典是祖师。有的人一生都没见过它的真面目，有的人读了它的文章却不懂其中的含义，这些人虽然说是亲近，又能说什么呢？只不过是想求一两个药方罢了。大凡药方，前人制定法则，疾病变化多端，怎么能固执于固定的方子呢？设在富贵人家生病的患者，多位医生共同治疗，戴人一定不能顺从那些普通医生，那些普通医生也不能顺从戴人，因此常常感到孤立。只有读书人和高雅之士，推崇我的医术后又来找我，天天不离家门。戴人又说：我的医术，只可以教导书生，不能接受医生的轻视。一位老书生说：“我是书生，难道不知道书生？书生固然多给予赞许，但态度轻慢。”戴人问他：“那个人从未见过我治病，所以有这种言论。如果亲眼见我治好几十个人，自然会反思。凡是诽谤我的人，都是听信群医之口的风言风语。孔子说：‘潜移默化的谗言，像水滴石穿那样的伤害，在我这里行不通。’这可以说是明智了。”
A male patient suffered from diarrhea for more than ten years. He had already used Cardamomi Fructus Rotundus (Doukou), Colla Corii Asini (Ejiao), Terminalia Chebula Retzui (Hezi), Os Draconis (Longgu), and Alumina Calcinate (Kufan). He received moxibustion annually at the Zhongwan (CV12) acupoint, below the umbilicus, and the Zusanli (ST36) acupoint. His skin and flesh became shriveled and dry, his spirit was confused, his feet were swollen, and he passed watery stools resembling rice washings without restraint day or night. Dairen (Zhang Congzheng) examined the pulses of both his hands, finding them deep and faint, and said, "He will survive." The patient suddenly asked, "Can raw sheep liver be eaten?" Dairen immediately replied, "Sheep liver can stop diarrhea; it is especially suitable for consumption." The patient was delighted and ate about one small cup, which could be taken with grain gruel. After drinking a few mouthfuls of gruel, nearly half a cup, he subsequently ate another small cup of raw sheep liver. The next day, his diarrhea decreased by seven-tenths. After continuing in this manner for over a month, he recovered. This was all due to the sin of excessive dietary restriction.
Dairen often said: The Stomach is the sea of water and grain; it must not be deficient or timid. If it is deficient, all kinds of pathogenic factors will enter. If one desires to eat meat or vegetables, even if it seems contrary to the illness, one should allow small amounts to be consumed to entice the intake of grain gruels. This is the way of flexible adaptation. If one strictly demands only bland gruel, the patient will be displeased and eat less. Over time, this will worsen the disease and damage life. Such practices mislead people in the secular world.
Dairen often said: Regarding dysenteric toxin (Zangdu) and alcohol toxin causing hematochezia and hematemesis; blood obstruction in women under thirty; purulent and bloody severe dysentery occurring between June and July with unceasing pain; and pregnant women who are selective about food upon conception—none of these conditions require strict dietary taboos.
Dairen said: People claim I do not associate with other practitioners. Dairen said, "Do I not wish to associate with others? It is simply that those whose paths differ cannot plan together. The excellence of medicine regards the *Suwen* (Plain Questions) as its ancestor. Some have never seen its face in their lives; some read its text but do not understand its meaning. Although such people claim intimacy, what is there to discuss? They merely seek one or two prescriptions. Generally speaking, prescriptions were established by predecessors. Diseases change in hundreds of ways; how can one adhere rigidly to a fixed formula? In wealthy households where patients are treated by multiple physicians, Dairen would certainly not follow the common doctors, nor would they follow Dairen. Thus, he was often isolated. Only scholars and noble gentlemen, who admired him and returned repeatedly, kept his door busy daily. Dairen also said: My methods can only teach scholars; they cannot tolerate the disdain of medical practitioners. An old scholar said, "I am a scholar; do I not know scholars? Scholars tend to give approval but act lightly and casually." Dairen asked him, "That person had never seen me treat patients, hence such remarks. If he had personally witnessed me cure dozens of people, he would reflect on himself. All those who slander me believe the gossip of the group of doctors. Confucius said: 'The infiltrating slander and the subtle harm cannot take effect here.' This can be called wisdom."