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Morphologic changes in colonic tissue of rats. A: Control group (left) and model group (right); B: Single acupoint group (left) and two acupoints group (right); C: Three acupoints group (left) and medication group (right). There was mucosal and tissue injury in the model group. The recovery in the three acupoints and medication groups was slightly superior to that in the single and two acupoints groups (hematoxylin-eosin staining, × 50 magnification).
