Application of superior cervical ganglion block combined with cognitive behavioral therapy in patients with chronic insomnia

INTERVENTION: Cognitive Behavioral Therapy group (Group C):Cognitive Behavioral Therapy;Combination therapy group (SC group):Superior cervical ganglion block combined with cognitive behavioral therapy; CONDITION: Chronic insomnia PRIMARY OUTCOME: treatment efficacy rate; effective treatment rate; SECONDARY OUTCOME: Sleep diary parameters;Pittsburgh Sleep Quality Inde X(PSQI); INCLUSION CRITERIA: 1. Meets the diagnostic criteria for chronic insomnia as defined in the Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) of the United States. 2. Age range: 18 ‐ 64 years old. 3. BMI: 18.5 ‐ 27.0 kg/m^2. 4. Pittsburgh Sleep Quality Inde X(PSQI) score > 7. 5. Duration of illness: >= 3 months. 6. Depression inde X(SDS) score > 53, Anxiety inde X(SAS) score > 50. 7. Refuses to take sleeping pills. 8. Voluntarily participates and signs the informed consent form.