The best way to cope with the problem 为什么要用to呢？去掉to又错在哪里呢？ it seems to be the best way to...

the best way \u540e\u63a5\u4ec0\u4e48\uff1f\u662fto do\u8fd8\u662fdoing

the best way \u540e\u9762\u63a5+to do\u3002
\u4f8b\u53e5\uff1a
1\u3001So what is the best way to conduct a root cause analysis?
\u90a3\u4e48\u8fdb\u884c\u6839\u672c\u539f\u56e0\u5206\u6790\u7684\u6700\u597d\u7684\u65b9\u5f0f\u662f\u4ec0\u4e48\u5462\uff1f
2\u3001You should be excited about your goals and the best way to do that is to align your goals with your life and passions.
\u4f60\u5e94\u8be5\u5bf9\u81ea\u5df1\u7684\u76ee\u6807\u611f\u5230\u5174\u594b\uff0c\u505a\u5230\u8fd9\u4e00\u70b9\u7684\u6700\u597d\u7684\u529e\u6cd5\u662f\u628a\u4f60\u7684\u76ee\u6807\u548c\u4f60\u7684\u751f\u6d3b\u4ee5\u53ca\u70ed\u60c5\u76f8\u5339\u914d\u3002
3\u3001The best way to treat yourself to something nice is to save up for it and buy it when you can truly afford it.
\u4ee5\u67d0\u79cd\u597d\u4e1c\u897f\u6765\u6b3e\u5f85\u81ea\u5df1\u6700\u597d\u7684\u65b9\u5f0f\uff0c\u5c31\u662f\u4e3a\u8fd9\u4ef6\u4e1c\u897f\u6512\u94b1\uff0c\u5230\u5f53\u4f60\u771f\u6b63\u4e70\u5f97\u8d77\u7684\u65f6\u5019\u4e70\u4e0b\u5b83\u3002
4\u3001He shows that the best way to unmask the thought of non-believing scientists is to show how the basis for their reasoning cannot be proven scientifically.
\u4ed6\u544a\u8bc9\u8bf4\uff0c\u8981\u63ed\u9732\u4e0d\u4fe1\u6559\u79d1\u5b66\u5bb6\u601d\u60f3\u7684\u5b9e\u8d28\uff0c\u6700\u597d\u7684\u529e\u6cd5\u5c31\u662f\u5c55\u793a\u4ed6\u4eec\u7acb\u8bba\u7684\u57fa\u7840\u5982\u4f55\u4e0d\u80fd\u4e3a\u79d1\u5b66\u65b9\u6cd5\u6240\u8bc1\u660e\u3002
5\u3001It\u2019s the best way to keep in touch with them.
\u8fd9\u662f\u8ddf\u4ed6\u4eec\u4fdd\u6301\u8054\u7cfb\u7684\u6700\u597d\u7684\u65b9\u5f0f\u4e86\u3002

that\u5427\uff0c\u4e00\u822c\u5728\u9650\u5236\u6027\u5b9a\u8bed\u4ece\u53e5\u4e2d\uff0cthat\u6bd4which\u7528\u5f97\u591a\u3002
\u4ee5\u4e0b\u662f\u4e00\u5bb6\u4e4b\u8a00
\u5728 the way\u8868\u65b9\u5f0f\u65b9\u6cd5\uff0c\u505a\u4e3b\u8bed\u6210\u5206\uff08\u5728\u9650\u5236\u5b9a\u8bed\u4ece\u53e5\u4e2d\uff09\u65f6\uff0c\u53ef\u4ee5\u7528that/which\uff0c\u4f46\u662f\u6b64\u53e5the way\u5728\u5b9a\u8bed\u4ece\u53e5\u4e2d\u662f\u505a\u5bbe\u8bed\u7684\u3002

the way to do something 是固定用法，

意思是“做什么事的方式/方法"

这里的 to 属于不定式用法，英语中语法连接词。

答：
没什么为什么，就是这样规定的。
the way to do sth.
或者the way of doing sth.

扩展阅读：xbox series x ... a map of china ... the best way to do sth ... as much as possible ... one of the best way ... trouble is a friend ... texas instruments ... in the best way ... another student ...