Mechanisms of Electroacupuncture for Functional Dyspepsia Based on "Enterotypes" and Metabolomics

The goal of this clinical trial is to explore the clinical efficacy and possible mechanisms of electroacupuncture treatment for functional dyspepsia (FD). The main question it aims to answer are: * Differences in the effects of electroacupuncture and sham electroacupuncture intervention on FD. * Differences in gastrointestinal hormone levels and gut microbiota and their metabolites between healthy individuals and FD patients. Participants receive electroacupuncture and sham electroacupuncture interventions respectively. Before and after the intervention, the clinical symptom score, gastrointestinal symptom evaluation scale, gastrointestinal symptom score questionnaire, and functional dyspepsia quality of life scale of the subjects will be observed. The levels of gastrointestinal hormones MTL, Ghrelin, 5-HT, CCK, PYY, and GLP-1 will be measured, as well as the changes in microbial diversity and SCFAs in their metabolites in feces, A follow-up visit will be conducted one month after the intervention for all participants.