After sampling and investigation in Luancheng county, Zhao county and Xinhe county of Shijiangzhuang city and Qingyuan county of Baoding city, the following conclusions can be made.
英
美
- 通过对石家庄市的栾城、赵县、新河与保定市的清苑县四个典型污灌区进行调查与采样分析，同时以临近清灌区作为对照，初步得出如下结论：
