阅读短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。
Knowing
a little first aid could be life-saving if you see someone lying unconscious.
Too
often people don't do anything because they think they will kill the patient, but
by learning simple rules you could make the difference between life and death.
First,
you need to find out if they're unconscious, asleep or drunk, by squeezing the skin
between their neck and shoulder and shouting. If there is no response at all, you
need to establish if they are dead or just unconscious—sometimes it's very difficult
to tell the difference.
Open
the airway by placing one hand on their forehead and gently tilting the head back
while lifting the chin.
If there
are no signs of life—no obvious pulse and their chest is not going up and down—call
an ambulance and then start cardiopulmonary resuscitation (CPR) (心脏复苏) to maintain (获得) a flow of oxygenated blood to the brain and heart.
Do this
by pushing up and down on the centre of the chest, with your hands interlocked together,
constantly until an ambulance arrives.
Push
at a rate of 100 beats a minute. You can't harm them doing this and might just save
a life.