# algorithm is now safe to use for directories.
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数据见证张家界母亲河澧水的生态蝶变：过去5年，国考断面水质稳居全国前列、最高排名全国第二，全市地表水、集中式饮用水水源地水质达标率均保持100％。随着澧水、溇水主干流入河排污口16个重点点位整治完成，“绿水绕仙境”的美景已成为常态。
Digression I thought that was everything to read about it until I wrote this post, and then saw there are a couple more parts, which are now on my reading list, so this post will be only about the first part linked above.
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