1表示点
0表示向量
https://zhuanlan.zhihu.com/p/625678401?utm_id=0
https://blog.csdn.net/weixin_44026604/article/details/112131372
https://blog.csdn.net/qq_38234381/article/details/108697802
https://blog.csdn.net/weixin_46773434/article/details/127417579
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