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(2) Market segmentation: In the "era of concentration", product spokesmen should also be detailed and spokesmen should be subdivided. Including the breakdown of gender, age, personality, nationality, etc. Different regions have different concepts, consumption patterns, consumption concepts, economic and cultural backgrounds and aesthetic methods. Stars have different influence in different regions.繁华都市，人群熙来攘往，每个人都怀揣着美好愿望等着属于他和她的缘。任何地方都会发生美丽的故事，也许是在商场、也许是在咖啡馆，又或许，是在地下铁……他忍不住伸出手指，轻轻触了触她的嘴唇。当代一城市，采薇和丈夫姜劲宇育有一儿一女。十二岁的儿子小强有轻度智障，女儿小雅六岁。姜劲宇因车祸离开人世，采薇独自抚养两个孩子。采薇被查出患有咽癌，为了将仅有的钱留给孩子而放弃治疗。采薇为小强找特殊学校。因身体原因采薇的求职也屡屡被拒。采薇带着孩子回到了故乡。年后的元宵节这天，采薇又一次晕倒了。经诊断发现癌细胞已扩散，采薇只剩三个月的生命了。关于采薇的病情，小镇的人们由开始的怀疑、猜测到同情、帮助。当小强和小雅明白妈妈即将离开他们的事实后，不停地用各种办法挽留妈妈，希望妈妈永远不要离开。纵然有万分不舍，采薇还是永远离开了她的孩子们，弥留之际，她将小雅和小强分别做了托付：小雅跟爷爷奶奶去大城市发展，小强留在小镇。采薇安详地离开了人世，永远地躺在青山绿水的怀抱里默默注视着她心爱的孩子们1 Replay3. I will not complain about the recommendation of books on in-depth learning. There are too many slots to spit. Save some effort and recommend books that are really suitable for novice readers at different stages.