《黄帝内经·素问·八正神明论》
要明了治疗的关键，必须从三部九候的病症脉象进行治疗，这就像看守门户一样的重要，虽然外表尚未见到病情，而医者已经知道疾病的形迹了。
知其所在者，知诊三部九候之病脉处而治之，故曰守其门户焉。莫知其情，而见邪形也。
In order to understand the key to treatment, treatment must be based on the signs and pulses of the three sections. This is as important as guarding a gate; even though the disease has not yet manifested outwardly, the doctor already knows its characteristics.
<s>[INST] Break down the structure and provide an English interpretation of the presented Classical Chinese phrase: 知其所在者，知诊三部九候之病脉处而治之，故曰守其门户焉。莫知其情，而见邪形也。 [/INST] English interpretation: In order to understand the key to treatment, treatment must be based on the signs and pulses of the three sections. This is as important as guarding a gate; even though the disease has not yet manifested outwardly, the doctor already knows its characteristics., Structural analysis: 
1. 知其所在者：Those who know the location (of the disease)
2. 知诊三部九候之病脉处而治之：know how to diagnose the location of the disease in the three sections and nine pulses 
3. 故曰守其门户焉：Therefore, guarding its gate 
4. 莫知其情：If one does not know the characteristics (of the disease) 
5. 而见邪形也：One will only see the external manifestations of the disease</s>
Break down the structure and provide an English interpretation of the presented Classical Chinese phrase: 知其所在者，知诊三部九候之病脉处而治之，故曰守其门户焉。莫知其情，而见邪形也。
user
English interpretation: In order to understand the key to treatment, treatment must be based on the signs and pulses of the three sections. This is as important as guarding a gate; even though the disease has not yet manifested outwardly, the doctor already knows its characteristics., Structural analysis: 
1. 知其所在者：Those who know the location (of the disease)
2. 知诊三部九候之病脉处而治之：know how to diagnose the location of the disease in the three sections and nine pulses 
3. 故曰守其门户焉：Therefore, guarding its gate 
4. 莫知其情：If one does not know the characteristics (of the disease) 
5. 而见邪形也：One will only see the external manifestations of the disease
assistant