【鱼同学的算法讲堂】数据结构专题之线段树基础
https://www.bilibili.com/video/av37703183/?redirectFrom=h5


线段树入门
https://www.bilibili.com/video/av40667689/?spm_id_from=333.788.videocard.4

菜鸟都能理解的线段树入门经典
https://blog.csdn.net/ray_seu/article/details/8705640


线段树--从入门到入土
https://www.cnblogs.com/rmy020718/p/9571490.html

线段树（超基础版）
https://www.bilibili.com/video/av47446422/