After a binge with cocaine, a young male is found unconscious and is admitted to the hospital with acute cocaine toxicity. Initial nursing action should be directed toward()

A．Setting limit for the patient

B．Giving support and understanding for the patient

C．Establishing a therapeutic relationship

D．Providing the necessary physical care

蓄电池维护时应注意“三防一及时”：防（）、防（）、防（）、及时充电。