早上好，我尝试将我的毕业论文第一页的“摘要”一词垂直对齐，但没有成功。如果我不插入“使用 latex 编辑”这句话，我可以做到这一点，但我想保留它。有什么建议吗？
\documentclass[12pt,a4paper,oneside,openright]{book}
\usepackage[italian]{babel}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage[utf8]{inputenc}
\usepackage[scaled=.90]{helvet}
\usepackage{titlesec}
\usepackage{guit}
\usepackage{makeidx}
\usepackage{lipsum}
\usepackage{layaureo}
\usepackage{emptypage}
\usepackage{setspace}
\usepackage{fancyhdr}
\usepackage{graphicx}
\usepackage{caption}
\usepackage{pdfpages}
\usepackage{float}
\usepackage{adjustbox}
\usepackage{longtable}
\usepackage{tabu}
\usepackage{pdflscape}
\usepackage{makecell}
\setcellgapes{2pt}
\usepackage{array}
\usepackage{dcolumn}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{eufrak}
\usepackage{mathrsfs}
\usepackage{amsmath,amssymb}
\usepackage{siunitx}
\usepackage{nicefrac}
\usepackage{xfrac}
\usepackage{varwidth}
\usepackage{tasks}
\usepackage{booktabs,cellspace}
\setlength\cellspacetoplimit{5pt}
\setlength\cellspacebottomlimit{5pt}
\usepackage{ragged2e}
\usepackage{changepage}
\usepackage{tabularx}
\usepackage{subfig}
\usepackage{cancel}
\usepackage{dblfloatfix}
\usepackage[colorlinks=true,allbordercolors=white]{hyperref}
\usepackage[all]{hypcap}
\usepackage{cleveref}
\usepackage[inline]{enumitem}
\usepackage[autostyle,italian=guillemets]{csquotes}
\usepackage[bibstyle=authoryear,citestyle=authoryear-comp,backend=biber,useprefix=true]{biblatex}
\usepackage{url}
\usepackage{multirow}
\usepackage{rotating}
\usepackage{listings}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usepackage{colortbl}
\usepackage{xcolor}
\usepackage[italian]{varioref}
\usepackage{bookmark}
\usepackage{verbatim}
\usepackage{pict2e}[2009/06/01]
\usepackage{wrapfig}
\usepackage{wasysym}
\usepackage{numprint}
\usepackage{tikz}
%%%%%%%%%%%%%%%%%%%%%%%% envinronment definition %%%%%%%%%%%%%%%%
\makeatletter
\if@titlepage
\newenvironment{abstract}{%
\titlepage
\null\vfil
\@beginparpenalty\@lowpenalty
\begin{center}
\bfseries \abstractname
\@endparpenalty\@M
\end{center}}%
{\par\vfil\null\endtitlepage}
\else
\newenvironment{abstract}{%
\if@twocolumn
\section*{\abstractname}%
\else
\small
\begin{center}%
{\bfseries \abstractname\vspace{-.5em}\vspace{\z@}}%
\end{center}%
\quotation
\fi}
{\if@twocolumn\else\endquotation\fi}
\fi
\makeatother
%%%%%%%%%%%%%%%%%%%%%%%% end envinronment definition %%%%%%%%%%%%%%%%
\onehalfspacing
\raggedbottom
\begin{document}
\frontmatter
\pagestyle{plain}
\begin{abstract}
\vfill
\lipsum[1]
\mbox{}
\vfill
\centering
{\large Edit with \LaTeX }\\
\end{abstract}
\mainmatter
\appendix
\backmatter
\end{document}\\
答案1
在文档正文中使用此代码（简化）：
\frontmatter
\pagestyle{plain}%
\begin{abstract}
\lipsum[1]
\mbox{}
\vfill
\centering
{\large Edit with \LaTeX }
\end{abstract}
\mainmatter
\appendix
\backmatter
在序言中，环境的定义abstract应该以
\titlepage
\null\vfill
代替
\titlepage
\null\vfil
