如何删除节后的空格以及小节前的空格？

Question

我试图摆脱在开始一个部分之后以及在小节之间（所以在小节之前？）出现的空白行。

目前我正在使用

    \usepackage{titlesec}
\setlength{\droptitle}{-6em}
\titleformat{\section}
       {\normalfont\bfseries}% formatting commands to apply to the whole heading
       {\thesection}% the label and number
       {0.0em}% space between label/number and subsection title
       {.{} }% formatting commands applied just to subsection title
       []% punctuation or other commands following subsection title
\titleformat{\subsection}[runin]% runin puts it in the same paragraph
       {\normalfont\bfseries}% formatting commands to apply to the whole heading
       {\thesubsection}% the label and number
       {0.0em}% space between label/number and subsection title
       {}% formatting commands applied just to subsection title
       []% punctuation or other commands following subsection title
\titleformat{\subsubsection}[runin]% runin puts it in the same paragraph
       {\normalfont\bfseries}% formatting commands to apply to the whole heading
       {\thesubsection}% the label and number
       {0.0em}% space between label/number and subsection title
       {}% formatting commands applied just to subsection title
       []% punctuation or other commands following subsection title
 \setlength{\parskip}{0cm}

但它似乎不起作用。

我会提供 MWE，但我正在使用 NiH 拨款提案模板和一堆其他结构文件。

谢谢！