使用{algorithm2e}宏包该怎么既调整浮动体与上下文本间距又不影响其他浮动体（如图片、表格）的效果？

请问您解决了嘛

关于浮动体的位置确定，强烈建议阅读Frank Mittelback's answer。

其中关键的参数为：

• \floatsep (default 12pt plus 2pt minus 2pt) the separation between floats in top or bottom areas
• \textfloatsep (default 20pt plus 2pt minus 4pt) the separation between top or bottom area and the text area
• \intextsep (default 12pt plus 2pt minus 2pt) inline floats (that have been placed "here") the separation to the surrounding text

在编组内修改\setlength{\textfloatsep}{100pt}确实无效，我想这也许和浮动体位置确定的时机有关（我也不是很懂啊哈哈哈，再开个问题吧）。可见下例：

参考这个链接，要想让该设置只对某一浮动体环境生效可以使用etoolbox的hook:

% 在导言区加上这个，同时不要将`algorithm`放在编组(group)内即可...
\usepackage{etoolbox}
\BeforeBeginEnvironment{algorithm}{\setlength{\intextsep}{0pt}\setlength{\floatsep}{0pt}\setlength{\textfloatsep}{0pt}}

我简单修改了以下MWE如下:

\documentclass{article}
% https://ask.latexstudio.net/ask/question/17506.html
\usepackage[
    letterpaper,
    top=2cm,bottom=2cm,
    left=3cm,right=3cm,
    marginparwidth=1.75cm
]{geometry}
\usepackage{algorithm2e}
\usepackage{lipsum}
\usepackage{graphicx}

\usepackage{etoolbox}
\BeforeBeginEnvironment{algorithm}{\setlength{\intextsep}{0pt}\setlength{\floatsep}{0pt}\setlength{\textfloatsep}{0pt}}


\begin{document}

\lipsum[1-3]

\begin{figure}[h]
\centering
\includegraphics[width=0.25\linewidth]{example-image-a}
\caption{\label{fig:frog}This frog was uploaded via the file-tree menu.}
\end{figure}

\lipsum[1-3]

% 当浮动体浮动到顶端时，下面的调整似乎无效!确实!
% \setlength{\floatsep}{300pt}
% \setlength{\textfloatsep}{100pt}
% \setlength{\intextsep}{300pt}
\RestyleAlgo{ruled}
\begin{algorithm}[htbp]
    \SetAlgoLined
    \KwData{this text}
    \KwResult{how to write algorithm with \LaTeX2e }
    initialization\;
    \While{not at end of this document}{
        read current\;
        \eIf{understand}{
            go to next section\;
            current section becomes this one\;
        }{
            go back to the beginning of current section\;
        }
    }
    \While{not at end of this document}{
        read current\;
        \eIf{understand}{
            go to next section\;
            current section becomes this one\;
        }{
            go back to the beginning of current section\;
        }
    }
    \caption{How to write algorithms}
\end{algorithm}

\lipsum[1-3]

\end{document}