杨栋梁说：这次事故损失惨重，暴露出的突出问题是，输油管道与城市排水管网规划布置不合理；对输油管道疏于管理，造成原油泄漏。
The serious damage in this incident has highlighted major problems , including the location of the pipelines and the sewerage grid and the negligent maintenance of the oil pipeline that caused the oil leak ,'' Mr Yang said .
杨栋梁