mtpro2 中斜体差分 d 的间距

Question

由于字符上的斜体校正，字体包的差异数量mtpro2无法正确排版（我认为）d。

使用此帖子

数学字母的斜体校正

我决定尝试删除斜体校正。虽然这对一些差异有用，但并不适用于所有差异。MWE：

\documentclass{article}
\usepackage{mtpro2}
\usepackage{mathtools}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand*\ric[1]{\vphantom{#1}\smash{#1_{}\kern-\scriptspace}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\[
\begin{matrix}
 \text{with italic correction} &dx & d\tau \\
 \text{without italic correction} &\ric{d}x & \ric{d}\tau
\end{matrix}
\]
\[
\begin{matrix}
 \text{with italic correction} &df & dj \\
 \text{without italic correction} &\ric{d}f & \ric{d}j
\end{matrix}
\]
\end{document}

和输出

显然d\tau，和dx从删除斜体校正中获益匪浅，而df和dj则受到影响，并且相距太远。

https://tex.stackexchange.com/a/557217/95517

似乎表明这是因为 的mtpro2字体度量定义d与 Computer Modern 不同，后者d主要将其视为微分算子。我怎样才能使 的间距d成为微分算子的间距？