内联数学方程式 点大小

Question

如何全局更改所有方程点大小（内联和显示方程），点大小在其中起作用\begin{array}...\end{array}但没有改变$....$？

请查找 MWE 文件：

\documentclass{book}
\usepackage{amsmath,array}
\usepackage{stix}

\everydisplay{\fontsize{15pt}{18pt}\selectfont}
\everymath{\fontsize{15pt}{18pt}\selectfont}

\parindent0pt
\begin{document}

Use the alternative calculation described above. In comparing the two values, you want to consider fluctuations in inventory over time.
Use the alternative calculation described above. In comparing the two values, you want to consider fluctuations in inventory over time.

$\alpha\beta\gamma\delta\epsilon0123456789+-$
\bigskip

$\begin{array}{@{}l}\alpha\beta\gamma\delta\epsilon0123456789+-\end{array}$


\begin{align*}
\alpha\beta\gamma\delta\epsilon0123456789+-
\end{align*}

\end{document}