Effect of Electroacupuncture Combined With Donepezil for Treating Alzheimer's Disease

A prospective randomized controlled trial aimed at assessing if electroacupuncture (EA) combined with donepezil is more effective than donepezil for improving the cognitive function of AD patients. The hypothesis of this study is as follow: * Is the short-term effect of EA combined with donepezil better than donepezil on improving cognitive function of patients with Alzheimer\'s disease after 12 weeks\' treatment? * Whether the effect of EA combined with donepezil on improving cognitive function can last until the end of 6 months\' follow-up?