Manuscript Sections
Followed by preamble the document section begins. The general template is as follows:
\begin{document}
\end{document}
Inside this, abstract, sections, figures and tables has to be nested. Like,
\begin{document}
    \begin{abstract}
    Some text goes here.
    \end{abstract}
    \section{Introduction}
    Some text goes here.
    \section{Results and Discussion}
    Some text goes here.
        \begin{figure}
        Figure Details Here
        \end{figure}
        \begin{table}
        Table Details Here
        \end{table}
    ...
\end{document}
- though mentioned seprately (will be discussed seprately) the references should also be nested in the documents part, prior to \end{document}as:
...
\bibliography{ref}
\end{document}
Special Sections
Usually