gitee转之前：
https://gitee.com/nmydt/picture-bed/blob/master/img/97a8eacc9ea407bb.jpg
转之后
https://gitee.com/nmydt/picture-bed/raw/master/img/97a8eacc9ea407bb.jpg
即将blob换成raw
github转之前：
https://github.com/yourusername/test/blob/master/img/3.jpg
转之后
https://github.com/yourusername/test/raw/master/img/3.jpg
即将blob换成raw
其实上方链接最终跳转到
https://raw.githubusercontent.com/yourusername/test/master/img/3.jpg
即也可以改成
github.com换成raw.githubusercontent.com，删去blob即为最终链接