visualMap 折线图分段用不同的颜色

https://blog.csdn.net/a_leading/article/details/77891530
https://blog.csdn.net/lgs790709/article/details/118958235
https://blog.csdn.net/qq_36538012/article/details/110179244
https://blog.csdn.net/qq_43344133/article/details/113090832
https://blog.csdn.net/xiaoshiguang3/article/details/110523277
echarts折线图不同时段显示不同颜色
https://echarts.apache.org/zh/option.html#visualMap-piecewise.pieces
https://www.i4k.xyz/article/a_leading/77891530
https://blog.csdn.net/ningyanggege/article/details/117286247

gt & lte

最近在mongo数据库查询数据，错误的以为gt为等于的意思，导致下载的数据，时间越早数据量越大，
eq 等于
neq 不等于
gt: greater than 大于
gte: greater than or equal 大于等于
lt: less than 小于
lte: less than or equal 小于等于

gt: greater than 大于
gte: greater than or equal 大于等于
lt: less than 小于
lte: less than or equal 小于等于