这条论文审稿意见如何回复

最近投稿，审稿人给了这么一条意见，让我用结构网格，但我之前所有的东西都是用非结构网格做的，不想按他的意思改，二审回来时如下的意见，我现在该怎么办，请各位有经验的大神帮我出出主意吧，谢谢了！
It is obvious that the author does not intend to change the method of mesh generation. The author contends that tetrahedral meshes can effectively predict pump performance, providing an explanation through grid independence. However, the author's presentation of grid independence is insufficient, with only six contrasting cases provided, and the grid refinement does not adhere to standard grid independence criteria. Additionally, I am aware that some pump geometries pose challenges in generating hexahedral mesh structures, and the author might consider exploring the use of Cartesian grids as an alternative. Therefore, the numerical simulation approach starting from step one is controversial.

除非你能从技术层面说服审稿人，否则至少要按结构网格做个对比计算。