纽约拉松赛是最负盛名的马拉松赛事之一，该赛事有200万人沿街观看，人群满布在纽约所有的五个区的桥梁上，穿越了纽约著名的地标。
我的理解是，后面的所有词修饰的都是people
【If there are celebrities that you are条件状语】, it is best to remember 【that their lives are very different from most people's lives宾语从句】 and 【that though may seem glamorous, they have their own imperfections like everyone else并列宾语从句，其中的though may seem glamorous为插入语，做让步状语】.
句子的主要干是：
it is best to remember 【that their lives are very different from most people's lives】 and 【that they have their own imperfections like everyone else】. 两个that引导两个并列宾语从句。
We是主语 start 是谓语with the contrast 是状语some draw是start的宾语between a Western emphasis on discovery learning to encourage creativity and the traditional Chinese preference for a more guided approach to developing skills是分隔式定语修饰contrast。本句=we start some draw with contrast between。。。and。。。。
我们从二者之间的对比中 抽出 某个例子 开始，西方强调发现式学习来鼓励创造力，中国传统倾向于更具引导性的发展技能。
以上供参考。