《史记·三十世家·赵世家》
医生扁鹊看过后走出来，董安于询问病情，扁鹊说： 血脉平和，你们何必惊怪！
医扁鹊视之，出，董安于问。扁鹊曰： 血脉治也，而何怪！
After examining, Doctor Bian Que came out. Dong Anyu asked about Zhaijianzi's condition,  Bian Que said: The blood flow is smooth, why are you so surprised?