什么是ABTest？

https://mp.weixin.qq.com/s/Fz-CTbZNQWMmtogkyAg0zg

https://zhuanlan.zhihu.com/p/146090463#:~:text=%E5%A6%82%E4%BD%95%E5%81%9A%E4%B8%80%E6%AC%A1%E5%AE%8C%E7%BE%8E%E7%9A%84%20ABTest%EF%BC%9F%201%E3%80%81%E7%A1%AE%E5%AE%9A%E5%AF%B9%E7%85%A7%E7%BB%84%E5%92%8C%E5%AE%9E%E9%AA%8C%E7%BB%84%EF%BC%8C%E6%9C%80%E5%A5%BD%E6%98%AF%E5%81%9A%20%E5%8D%95%E5%8F%98%E9%87%8F,%E7%9A%84%E5%AE%9E%E9%AA%8C%EF%BC%8C%E4%B8%80%E6%AC%A1%E5%8F%AA%E6%94%B9%E5%8F%98%E4%B8%80%E4%B8%AA%E5%8F%98%E9%87%8F%E3%80%82%202%E3%80%81%E5%88%86%E6%B5%81%E6%97%B6%E5%B0%BD%E9%87%8F%20%E6%8E%92%E9%99%A4%E6%B7%B7%E6%9D%82%E5%9B%A0%E7%B4%A0%20%EF%BC%8C%E4%B8%80%E8%88%AC%E6%83%85%E5%86%B5%E4%B8%8B%E9%87%87%E7%94%A8%E9%9A%8F%E6%9C%BA%E5%88%86%E6%B5%81%E5%8D%B3%E5%8F%AF%E3%80%82