一、http://www.javashuo.com/article/p-sdskafxs-mt.htmlsegmentfault
二、https://www.jianshu.com/p/8269e4cac48fget
三、https://www.jianshu.com/p/ac629a1cb8f5co
四、https://www.jianshu.com/p/f4e365273ecbps
五、https://www.jianshu.com/p/c8dadf10ec98tar
