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  3. If you see someone drowning, speed is very important. Once you get him out of the water, if he isn’t breathing, you have four mi

If you see someone drowning, speed is very important. Once you get him out of the water, if he isn’t breathing, you have four mi

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问题     If you see someone drowning, speed is very important. Once you get him out of the water, if he isn’t breathing, you have four minutes before his brain is completely damaged. Support his neck, tilt his chin upwards. This stops the tongue blocking the air way in the throat and is sometimes enough to get him breathing again. If that doesn’t work, start mouth-to-mouth breathing. Press his nostrils (鼻孔) together with your fingers. Open your mouth wide and take a deep breath. Blow into his lungs until his chest rises, and then remove your mouth and watch his chest fall. Repeat twelve times a minute, keep going until professional help arrives.
    To bring a child back to life, keep your lips around its mouth and nose and gently blow into its mouth. Give the first four breaths as quickly as possible to fill the blood with oxygen. If, in spite of your efforts, it starts turning blue grey colour, and you can feel no pulse, then pressing its chest is the last chance of saving its life.
    With arms straight, rock forward, pressing down on the lower half of the breastbones. Don’t be too hard, or you may break a rib (肋骨). Check how effectively you are by seeing if his colour improves or his pulse becomes independent to your chest pressing. If this happens, stop the pressing. Otherwise continue until an ambulance arrives.
Once a person stops breathing, it means ______ .
选项 A、you have no more than 4 minutes to bring him to life again
B、his brain is completely damaged
C、he has passed away
D、there is no way to save his life
答案A
解析
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