单项选择题
A person has suffered a laceration of the arm. Severe bleeding has been controlled by using a sterile dressing and direct pressure. What should you do next?（）
A.Apply a tourniquet to prevent the bleeding from restarting B.Apply a pressure bandage over the dressing C.Remove any small foreign matter and apply antiseptic D.Administer fluids to assist the body in replacing the lost blood
单项选择题 A person has fallen overboard and is being picked up with a lifeboat. If the person appears in danger of drowning，the lifeboat should make（）.
单项选择题 A negative metacentric height（）.
单项选择题 A minor heat burn of the eye should be treated by（）.
