Which of the following means lack of feeling and sensation? A: aphasia B: analgesia C: anesthesia D: ataxia

翻译题。Clinical anesthesiology remains the main content of anesthesiology.Before anesthesia, anesthesiologists, missions are to evaluate,prepare and medicate for patients to acquire the patients, physical and mental condition,select adequate anesthesia thchnique and relieve anxiety;during the operation,anesthesiologists should provide analgesia or amnesia for patients to eliminate discomfort,induce sedation,promote hemodynamic stability,and alleviate surgery-related adverse reflection and stress response;after the operation,physical function of patients should be measured and monitored in PACU to regulate and correct abnormal condition,ensure the safety ofPatients and prevent postoperativecomplications. Quality of anesthesia management has a considerable influence on the safety of patients and success ofoperation.The practice of anesthesia is not confined to operation room but expanded to several fileds to implementanesthesia and sedation, such as endoscopic measurement,lithotripsy,magnetic resonance imaging,computedtopography scan,fluoroscopy,electroconvulsive therapy.