洁古《此事难知》有曰∶动而得之曰中热，静而得之曰中暑。此言不能无议。夫中热、中暑，均自夏月感受之热邪
也。故中暑即是中热，初无有分，但其得之则有别者。如行人、农夫，奔走劳动于道途田野之间，此时热气充斥，一时
昏闷猝倒，此谓中暑，即谓中热，是皆动而得之者也。若静而得之者，如安逸之人，乘凉于大厦高堂、凉亭水阁，一时
阴寒之气遏郁，周身之阳气不得舒越，而肌肤粟栗、头疼、发热，此是夏月感寒病，而不得以中暑名之也。中暑
者，中天令之热邪，岂有感受房室阴寒之气，而混以静时得之，亦名之曰中暑可乎？若静时感夏月之寒，
而漫称曰中暑，使不正其名、辨其症，而以清暑寒凉之品，如彼白虎、益元投之，其祸人必矣！
小便不通者，热结膀胱而点滴不下也。经曰∶膀胱不利为癃。此热邪入于膀胱而为病。膀胱为津液之
府，气化能出，故三焦之气不化，则水道不能通调，而下输于膀胱为溺。丹溪隔二之治，以为水出高源，
肺金者，肾之母，滋养肺金以生肾水，此法之善者也。若隔三之治，以脾湿不运，故精气不调，当燥脾
健胃，补土以生金，生金以壮水，用二术、六君为治。夫气虚则宜补气以化水，若气热而反用燥气、闭
气之剂，不几助邪以为病。此隔三之治，为迂而不切。
洁古在《此事难知》中说：运动时得病称为中热，静止时得病称为中暑。这种说法不能没有争议。所谓中热和中暑，都是夏季感受的热邪所致。因此中暑就是中热，起初并没有区分，只是获得病因的方式有所不同。例如行人、农夫，在道路田野之间奔走劳动，此时热气充斥，一时昏闷猝倒，这称为中暑，也就是中热，这些都是动而得之的情况。如果是静而得之，比如安逸之人，在大厦高堂、凉亭水阁乘凉，一时阴寒之气遏郁，周身阳气不得舒展，出现肌肤粟栗（皮肤起鸡皮疙瘩）、头痛、发热，这是夏季感受寒邪的病证，而不能称之为中暑。中暑，是感受天令之热邪，哪有感受房室阴寒之气，却混同于静止时得病，也称之为中暑的道理呢？如果在静止时感受夏季的寒邪，却随意称为中暑，如果不正其名、辨析其症状，而使用清暑寒凉的方药，如白虎汤、益元散投予患者，那必定会害人性命！
小便不通，是热邪结聚膀胱导致点滴不下的情况。经书说：膀胱不利为癃（排尿不畅或闭塞）。这是热邪侵入膀胱而致病。膀胱是津液汇聚之所，依靠气化作用才能排出尿液，所以如果三焦的气化功能失常，水道就不能通调，进而下输至膀胱形成溺尿。丹溪提出的“隔二”治法，认为水出高源（肺），肺金是肾水之母，通过滋养肺金来生肾水，这是很好的方法。至于“隔三”治法，是因为脾湿不运，导致精气不调，应当燥脾健胃，补土以生金，生金以壮水，使用苍术、白术、六君子汤进行治疗。如果气虚则适宜补气以化水，若是气热反而使用燥气、闭气的药剂，岂不是助长邪气而致病吗？这种“隔三”的治法，是迂腐而不切实际的。
Jiegu, in *Ci Shi Nan Zhi* (Difficulties of This Matter), stated: "Illness acquired during movement is called Zhong Re (Heat Stroke/Summerheat from exertion); illness acquired during stillness is called Zhong Shu (Summerheat from stagnation)." This statement is open to discussion. Both Zhong Re and Zhong Shu result from the pathogenic heat evil contracted in summer. Therefore, Zhong Shu is essentially Zhong Re; originally, there was no distinction, but only the manner of acquisition differs. For instance, travelers and farmers who toil on roads and fields are exposed to surging heat, leading to sudden fainting or collapse. This is termed Zhong Shu, which is also Zhong Re; these are all cases of "acquired through movement." Conversely, for those "acquired through stillness," such as idle individuals seeking coolness in grand halls, pavilions, or waterside structures, a sudden accumulation of yin-cold qi may obstruct the free flow of yang qi throughout the body, resulting in cutis anserina (goosebumps), headache, and fever. This is a disease caused by contracting cold in summer and should not be named Zhong Shu. Zhong Shu refers to contracting the heat evil of the heavenly season; how can one contract the yin-cold qi of dwellings yet confuse it with illness acquired during stillness and also call it Zhong Shu? If one contracts summer cold during stillness but loosely calls it Zhong Shu, failing to correctly name it and differentiate its symptoms, and instead administers cooling and clearing summerheat agents such as Baihu Tang (White Tiger Decoction) or Yiyuan San (Benefit Origin Powder), the harm to the patient will certainly ensue!
Obstruction of urination occurs when heat evil knots in the Bladder, preventing even drops from passing. The Classics state: "When the Bladder is not unobstructed, it leads to Long (stranguria/dysuria)." This indicates that the pathogenic heat has entered the Bladder causing disease. The Bladder is the mansion of Body Fluids; it relies on Qi transformation to excrete urine. Thus, if the Qi transformation of the Triple Burner fails, the water passages cannot regulate properly, and fluids fail to descend to the Bladder to form urine. Danxi's treatment method of "separating two organs" (Ge Er) posits that water originates from the high source (Lung Metal). Since Lung Metal is the mother of Kidney Water, nourishing Lung Metal generates Kidney Water; this is an excellent method. As for the treatment method of "separating three organs" (Ge San), it addresses cases where Spleen dampness fails to transport, leading to discordant essence and Qi. One should dry the Spleen and strengthen the Stomach, tonify Earth to generate Metal, and generate Metal to strengthen Water, using Cang Zhu (Atractylodis Rhizoma), Bai Zhu (Atractylodis Macrocephalae Rhizoma), and Liu Jun Zi Tang (Six Gentlemen Decoction). If Qi deficiency exists, it is appropriate to tonify Qi to transform water; however, if there is Qi heat, administering agents that dry or close Qi would merely assist the pathogen in causing disease. Therefore, the "separating three organs" treatment is pedantic and impractical.