手少阴心经唯独没有五输穴，这是为什么呢？回答说：少阴经，就是心脉。心，是五脏六腑中的主要脏器，是帝王精神所居之处。心的脏体坚固，邪气不能容纳，如果邪气容纳其中就会损伤心脏，心脏受损则神志离去，神志离去人就会死亡。所以凡是邪气在心部的，都停留在心包络上，心包络，就是代心行令的经脉，所以少阴经没有五输穴。少阴经没有五输穴，心脏就不生病吗？回答说：它的外在经络和腑会生病，但脏本身不生病，所以唯独取用手少阴经在掌后锐骨（豌豆骨）端的穴位。
夏季三个月，由心和小肠主管，对应赤色血脉，发生KT病（注：原文“KT”疑为衍文或特定符号，此处依原文保留）。其病源在于少阴与太阳之气相互搏结而停滞，导致营卫运行不通，皮肤肌肉疼痛突起。太阳经气动发引发少阴经病变，淫邪之气因此发作，脏腑就会随时受到夏季疫病的侵害。这种病症表现相似，若腑气虚弱，则受阴邪之气侵袭……
The Hand-Shaoyin meridian alone lacks the Five Shu points. Why is this? It is said: The Shaoyin meridian is the Heart meridian. The Heart is the great master of the five zang organs and six fu organs, serving as the residence for the spirit of the sovereign. Its organ is solid and firm; pathogenic factors cannot reside within it. If they do reside, the Heart will be injured; if the Heart is injured, the Shen (Spirit) will depart; if the Shen departs, death ensues. Therefore, whenever pathogenic factors are located in the Heart region, they reside in the Pericardium Luo (Pericardium collateral). The Pericardium Luo is the meridian that acts on behalf of the Heart Master. Thus, the Shaoyin meridian has no Five Shu points. Since the Shaoyin meridian has no Five Shu points, does the Heart never become diseased? It is said: Its exterior meridians and fu organs may become diseased, but the zang organ itself does not. Therefore, one exclusively selects the point at the end of the sharp bone behind the palm (Shenmen, HT7).
During the three months of summer, the Heart and Small Intestine are in charge, corresponding to the red blood vessels and KT disease [Note: "KT" appears to be a textual anomaly or specific symbol in the source]. The origin of this condition lies in the conflict and stagnation between the Qi of Shaoyin and Taiyang, leading to the obstruction of Ying (Nutritive) and Wei (Defensive) circulation, resulting in pain and swelling of the skin and flesh. When the movement of the Taiyang meridian triggers pathology in the Shaoyin meridian, excessive pathogenic factors arise, causing the zang and fu organs to be susceptible to summer epidemic diseases at any time. The manifestations of these diseases are similar; if the fu organs are deficient, they are invaded by Yin pathogenic factors...