Como evitar que novas seções vão para a próxima página ou parágrafos em LaTeX

Como evitar que novas seções vão para a próxima página ou parágrafos em LaTeX

Estou trabalhando em meu artigo de duas colunas. Percebo que muitas vezes quando utilizo o \section{}comando em LATEX, a nova seção aparece na próxima coluna (ou mesmo na próxima página), mesmo que a primeira coluna ou página anterior não esteja cheia de texto. Isso cria um espaço vazio muito grande e estranho na parte inferior da primeira coluna ou página, apenas para que a nova seção possa começar em uma nova página ou coluna.

Existe alguma maneira de forçar facilmente a substituição desse padrão? Sempre quero que uma nova seção ocorra imediatamente após o final da seção anterior (com apenas um espaço de linha).

\documentclass[journal]{vgtc} % final (journal style)
%\let\ifpdf\relax
\usepackage[utf8]{inputenc}
\usepackage{mathptmx}
\usepackage{graphicx,xcolor}
\usepackage{sidecap}
\usepackage{times}
\usepackage{dblfloatfix}
\usepackage{fixltx2e}
\usepackage{mwe}
\usepackage{natbib}
\usepackage{fullpage}
\usepackage{color}
%\usepackage[dvipsnames,svgnames]
\usepackage[bookmarks,backref=true,linkcolor=black]{hyperref} %,colorlinks
\usepackage{listings} %% addedR
\hypersetup{
  pdfauthor = {},
  pdftitle = {},
  pdfsubject = {},
  pdfkeywords = {},
  colorlinks=true,
  linkcolor= black,
  citecolor= black,
  pageanchor=true,
  urlcolor = black,
  plainpages = false,
  linktocpage
}
\usepackage{wrapfig,float}
\usepackage{caption} %%% added
\captionsetup[figure]{slc=off}  %%% added
\usepackage{subcaption}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{url}
\usepackage{ulem}
\usepackage[section]{placeins}
\usepackage[export]{adjustbox}
\usepackage[colorinlistoftodos]{todonotes}
\usepackage{fancyhdr} 
\fancyhf{}
\cfoot{\thepage}
\pagestyle{fancy}

\newcommand{\hh}[1]{{\color{orange} #1}}
\graphicspath{{figure/}}
\renewcommand{\floatpagefraction}{.99}
\newcommand{\done}[2][inline]{\todo[color=SpringGreen, #1]{#2}}
\newcommand{\newdo}[1]{\todo[inline, color=Plum]{#1}}
\newcommand{\comment}[2][inline]{\todo[color=SkyBlue, #1]{#2}}
\newcommand{\newtext}[1]{\todo[inline, color=White]{ \color{OliveGreen}{#1}}}

\renewcommand{\headrulewidth}{0pt}


\begin{document}

\firstsection{First section}


This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. 

This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. 

This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. This is the first section. 

\section{Second section}
This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. 

This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. 

This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. 

This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. This is the second section. 

\end{document}

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