Text this: 星状神经节阻滞对前循环动脉瘤性蛛网膜下腔出血后行开颅手术患者早期脑灌注的影响(Effect of Stellate Ganglion Block on Early Cerebral Perfusion in Patients Undergoing Craniotomy for Anterior Circulation Aneurysmal Subarachnoid Hemorrhage)