党的十九大提出了建设富强民主文明和谐美丽的社会主义现代化强国目标。

海口市委、市政府牢固树立“绿水青山就是金山银山”的生态文明建设理念，以人民为中心，打造“最美美舍河”。海口市成立了以市委常委为指挥长的治水办，全天候现场办公，遇到问题“马上就办”。海口市环保局启动美舍河沿岸专项整治夜巡模式，打击偷排污水的行为。海口市园林局在美舍河沿岸种植生态水草，投放水生动物，构建美舍河河底完整生态链。同时，海口市加大对美舍河环保的宣传，提高人们的环保意识，举办各种活动吸引人们积极参与到美舍河治污与保护中来。

根据材料，说明海口市实现“最美美舍河”的各种举措蕴含了政治生活中的哪些道理。

     Yesterday my sister and I went____(buy)something for her birthday．She didn't really know what____(get)but she seemed____(like)the idea of a pet，so we went to the nearest pet shop．She started ____(look)around at an the animals．The man in the shop advised her ____(choose)the rabbits，but when she saw some puppies(小狗) ____(play)in the box，she said she would like____(have)one of them．I didn't know if we had enough money____(buy)one and I hoped my mother would want us____(have)a dog in the house，but my sister promised____(look after)it well and we had enough money，so we bought a little brown dog.

1999年，九届全国人大修订宪法，把什么内容写进了宪法（  ）