This is an multi-center，double-blinded，parallel and control study using Remimazolam or propofol for anesthesia in operations.Subjects are randomized to different treatment groups (including 3 for Remimazolam Tosilate and 1 for propofol) and anaesthetics are pumped contimuously into bodies.Analgesics and muscle relaxants are permitted during operations.Efficacy，safety and pharmacokinetic/pharmacodynamic profiles of Remimazolam Tosilate are to be evaluated.