thmtools：框和文本之间的间距

Question

使用包thm工具我怎样才能使 box-box、text-box 和 box-text 的间距都相同？box-text 和 text-box 的间距不一样。而且 box-box 的间距通常较大（我假设每个框的额外空间都已添加），当多个框连续时，会产生不必要的空间。

这是我使用的全部代码：

\documentclass{article}

%%Packages%%

\usepackage{amsmath,amssymb,amsthm}
\usepackage[usenames,svgnames,dvipsnames]{xcolor}
\usepackage{thmtools}
\usepackage[framemethod=TikZ]{mdframed}


%%Thmtools%%

%Theorem style
\declaretheoremstyle[
    headfont=\bfseries, 
    bodyfont=\itshape, 
    mdframed={
        linewidth=0.5pt, 
        nobreak=true, 
        innerbottommargin=7pt
    }
    ]{theoremstyle}

\declaretheorem[
    style=theoremstyle, 
    name=Theorem, 
    numbered=no
    ]{theorem]

\begin{document}


\begin{theorem}
This is a theorem.
\end{theorem}

This is some text.

\begin{theorem}
This is a theorem.
\end{theorem}

\begin{theorem}
This is a theorem.
\end{theorem}

\end{document}

Answer 1

由于 mdframed 并未得到积极维护，我建议您使用tcolorbox。该\tcolorboxenvironment命令可以使用带有自定义选项的 tcolorbox 包装任何环境。

\documentclass{article}

%%Packages%%

\usepackage{amsthm}
\usepackage{thmtools}
\usepackage{tcolorbox}

%%Thmtools%%

%Theorem style
\declaretheoremstyle[
    headfont=\bfseries, 
    bodyfont=\itshape, 
    ]{theoremstyle}

\declaretheorem[
    style=theoremstyle, 
    name=Theorem, 
    numbered=no,
    ]{theorem}

\tcolorboxenvironment{theorem}{
  colback=white,
  sharp corners,
  boxrule=0.5pt,
  left=0.3cm,
  right=0.3cm,
  }

\begin{document}

\begin{theorem}
This is a theorem.
\end{theorem}

This is some text.

\begin{theorem}
This is a theorem.
\end{theorem}

\begin{theorem}
This is a theorem.
\end{theorem}

\end{document}