<qa>  What is the effect of transcutaneous electric acupoint stimulation on the quality of recovery inThe effect of transcutaneous electric acupoint stimulation TEAS on the quality of recovery in patients undergoing thyroidectomy surgery remains unclear. Therefore, the investigators conducted this prospective, randomized, double-blind study to verify the hypothesis that pre-operative TEAS could improve the quality of recovery QoR after thyroidectomy surgery. 