人们或者在猜测，管理好这样一条环境优美、风景如画的河道，究竟要有多少人、多少机构。
B-Person I-Person O O O O O O O O O O O B-Metric I-Metric O O O O O B-Location I-Location I-Location I-Location I-Location I-Location I-Location O O O O O O O B-Person O B-Organization I-Organization I-Organization I-Organization O