Comprehensive Ability Assessment and Non-pharmacological Cognitive Intervention in Older Adults

INTERVENTION: Cognitive training intervention group:Standardized cognitive training program twice a week for 45 minutes each session over 12 weeks, including training in memory, attention, language ability, and executive function.;Nursing home routine care control group:Receive routine nursing care and health education in nursing homes and communities, with no additional cognitive training or comprehensive intervention services provided; CONDITION: Cognitive impairment PRIMARY OUTCOME: Cognitive function level; SECONDARY OUTCOME: Quality of life in Alzheimer's disease; Activities of daily living (ADL);Neuropsychiatric symptoms;Loneliness level; Frailty status;Anxiety symptoms;Sleep quality;Happiness level;Depressive symptoms; INCLUSION CRITERIA: 1. Aged >=60 years and living long‐term in a nursing home; 2. Scores on the Mini‐Mental State Examination (MMSE) meet the diagnostic criteria for mild‐to‐moderate cognitive impairment; 3. No severe hearing or visual impairment, and able to cooperate with assessments and interventions; 4. Voluntarily participating in this study and signing the informed consent form. 5. Be of sound mind and possess basic communication skills; 6. Be able to complete assessment scales and intervention activities independently or with assistance.