A. Gently touch his or her shoulder and ask "Are you OK?" in a loud and clear voice. If he or she responds, CPR is not needed.
B. Give two rescue breaths(人工呼吸). If you are trained in CPR and really confident, give two rescue breaths after your 30 chest compressions(心脏按压).
C. Place the victim(受害者)on the ground. Make sure he or she is lying as flat(水平地)as possible. Perform 30 chest compressions.
D. Put your ear close to the victim's nose and mouth, and listen for breathing. If the victim is coughing or breathing normally, do not perform CPR.