化工行业ETF易方达紧密跟踪中证石化产业指数，中证产业指数系列从钢铁产业、船舶产业、石化产业、纺织产业、轻工产业、装备产业和物流产业等产业出发，编制相应产业指数，以反映沪深市场中各支柱产业上市公司证券的整体表现。
2025, Methods Lecture, Raj Chetty and Kosuke Imai, "Uncovering Causal Mechanisms: Mediation Analysis and Surrogate Indices"
。WPS下载最新地址是该领域的重要参考
（四）在铁路、城市轨道交通线路上私设道口或者平交过道的。
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