Inclusion Criteria:  ASA Ⅰ-Ⅲ grade; age 18-65 years old; gender is not limited; planned elective support laryngoscope surgery (glottic polypectomy under support laryngoscope, epiglottic cyst excision under support laryngoscope, benign laryngeal under support laryngoscope Lesion resection), endoscopic septoplasty, endoscopic tympanoplasty, endoscopic middle ear tube insertion, nasopharyngoplasty, head and neck benign mass resection for general anesthesia intubation patients; operation time No more than 90min.  Exclusion Criteria:  - Emergency surgery;  abnormal renal function (urea nitrogen ≥1.5×ULN, blood creatinine greater than the upper limit of normal); abnormal liver function; hypovolemia, shock or coma; suffering from mental illness and long-term use of psychotropic drugs; cognition Dysfunction; those who are allergic to or contraindicated to benzodiazepines and their drug components; pregnant or lactating female patients; have a history of drug dependence; have used other sedatives in the past week; have been a subject within the past 3 months Participated in drug clinical trials