个体需求维度（核心，最易展开）
底层逻辑：年轻人的核心需求（求学提升limited educational resources、就业谋生 stable and well-paid jobs with promising prospects、个人发展personal development），在农村无法得到满足，而城市可以。
环境供给维度
底层逻辑：农村与城市在“资源、设施、政策”上的差距，倒逼年轻人流向城市 【The gap between rural and urban areas forces young people to move to cities.】
社会背景维度
底层逻辑：结合社会发展趋势（如城市化urbanization、工业化 industralization）、政策导向（policy orientation），说明人口流动是社会发展的必然结果。
原因素材：
The primary reason for this rural-urban migration (城乡迁移) is the pursuit of better educational opportunities (教育机会). Compared with the countryside, cities are equipped with top-tier universities (一流大学), advanced teaching facilities and experienced teaching staff. Young people can gain professional knowledge (专业知识) and academic qualifications (学历), which lay a solid foundation for their future career development. Secondly, cities provide a wider range of job prospects (就业前景) and higher salary levels (薪资水平). Urban areas are the centers of industries and businesses, offering numerous positions in high-tech industries (高科技产业), finance and services. In contrast, rural areas mainly rely on traditional agriculture with limited job choices and low income. Finally, cities have more entertainment facilities (娱乐设施) and a colorful lifestyle (丰富多彩的生活), which are more attractive to young people seeking a modern life.
好处大于坏处：
