The Emperor asked: "When doctors treat diseases, why are patients with similar diseases restored by different methods?"
Qi Bo answered: "Landscapes make it so. The eastern area is where the qi of heaven and earth engenders. That region teems with fish and salt, and has a long coast facing the sea. Its people eat fish and have a predilection for salt. The people are satisfied with their habitat and they feel all their foods to be delicious. Fish makes heat accumulate inside the body. Salt may damage the blood. Their skin is black and the muscular striae are loose. Their characteristic diseases are carbuncles and ulcers. Healing stones are beneficial treatment. Therefore, healing stones also come from the east.
Key Words: discussion of befitting different methods, in the plain questions
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