Acupuncture AnalgesiaAcupuncture TherapyAcupuncture PointsAnalgesiaPain, PostoperativeAcupunctureAnalgesia, EpiduralPain MeasurementAnalgesia, Patient-ControlledAnalgesia, ObstetricalAnalgesics, OpioidPainAcupuncture, EarPain ManagementMorphineAnesthetics, LocalAnalgesicsBupivacainePain ThresholdFentanylKetorolacNerve BlockTramadolChronic PainElectroacupunctureAcute PainPostoperative Nausea and VomitingMoxibustionMeridiansDouble-Blind MethodAnalgesics, Non-NarcoticPirinitramideMeperidine