一.什么是用户分层？ 用户分层是以用户价值（比如说：活跃用户、高价值用户）为中心来进行切割的，在同一分层模型下，一个用户只会处于一个层次中。还有一种说法是用户分群，它是以用户...
IP属地：上海
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4种常见的用户分层方法 -
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D22 晨读7期
原材料引用（Material）： Twenty-two percent survived with good brain ability. Only ten percent ...
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D19 晨读7期
原材料引用（Material）： The researchers say any kind of CPR improved chances of the patient's ...
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D17 晨读7期
原材料引用（Material）： 712 received CPR，439 received chest presses only. No mouth-to-mouth re...
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D16 晨读7期
原材料引用（Material）： In all the cases, witnesses saw the event happen.More than one thousan...
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D15 晨读7期
原材料引用（Material）： Doctors in Tokyo led the research. It examined more than four thousand...
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D12 晨读7期
原材料引用（Material）： The study was published in the British medical magazine, The Lancet. ð...
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D11 晨读7期
原材料引用（Material）： However, a new Japanese study questions the usefulness of mouth-to-mou...
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D10 晨读7期
原材料引用（Material）： CPR keeps blood and oxygen flowing to the heart and brain. si-pi-ɑr ki...
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D6 晨读7期
原材料引用（Material）： CPR combines breathing into the victim's mouth and repeated presses on...
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D5 晨读7期
原材料引用（Material）： Without lifesaving measures, the brain starts to die within four to si...
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D4 晨读7期
原材料引用（Material）： The heart stops pumping blood. The person stops breathing. ðəhɑrtstɑps...
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D3 晨读7期
原材料引用（Material）： The condition is called cardiac arrest. ðəkənˈdɪʃənɪzkɔldˈkɑrdiˌækəˈrɛ...
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D2 晨读7期
原材料引用（Material）： Cardiopulmonary resuscitation, or CPR, can save the life of someone wh...
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D1 晨读7期
原材料引用（Material）： This is the VOA Special English Health Report. ðɪs ɪz ðə viː-əʊ-eɪ ˈsp...
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