原材料引用（Materials）： The American Heart Association says about ninety-five ...

原材料引用（Materials）： Doctor Ewy thinks the CPR guidelines should be changed...

原材料引用（Materials）： He says this would save lives. Studies show that many ...

原材料引用（Materials）： It said people should increase the number of chest pre...

原材料引用（Materials）： Twenty-two percent survived with good brain ability. O...

原材料引用（Materials）： The researchers say any kind of CPR improved chances o...

原材料引用（Materials）： Seven hundred and twelve received CPR.Four hundred and...

原材料引用（Materials）： In all the cases, witnesses saw the event happen. More...

原材料引用（Material）： Doctors in Tokyo led the research. It examined more tha...