我的横向模式长表有格式问题：规则（顶部/中/底部）超出了边距并且标题居中（但我希望它左对齐）。
我没有缩短表格的内容，提前致歉，但由于我需要它（使用 itemize 等） - 我认为最好保持原样。
非常感谢！
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\begin{document}
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\footnotesize
{\def\arraystretch{2}\tabcolsep=10pt
\begin{longtable}
{
>{\raggedright\arraybackslash}p{4cm}
>{\raggedright\arraybackslash}p{4cm}
>{\raggedright\arraybackslash}p{4cm}
>{\raggedright\arraybackslash}p{4cm}
>{\raggedright\arraybackslash}p{4cm}
}
\caption[Characteristics of pressure driven membrane processes]{Characteristics of pressure driven membrane processes \cite{Mulder.1996}}
\label{tab:pressuredriven}\\
\toprule
&Microfiltraton&Ultrafiltration&Nanofiltration&Reverse Osmosis\\
\midrule
\endfirsthead
\caption[Characteristics of pressure driven membrane processes]{Characteristics of pressure driven membrane processes (continued)}\\
\toprule
& Microfiltraton & Ultrafiltration & Nanofiltration & Reverse Osmosis \\
\midrule
\endhead
Separation principle & sieving & sieving & solution-diffusion & solution-diffusion \\
Separation size & particles & \rr macromolecules, colloids & low molecular weight solutes & micro solutes, monovalent ions \\
Osmotic pressure & negligible & negligible & 1-25 bar & 15 - 80 bar \\
Applied pressure & 0.1 - 2 bar & 1 - 10 bar & 5 - 20 bar & 10 - 100 bar \\
Structure & \begin{minipage}[t]{\linewidth} symmetric,\newline asymmetric \end{minipage} & \begin{minipage}[t]{\linewidth} asymmetric,\newline dense top layer \end{minipage} & \begin{minipage}[t]{\linewidth} \raggedright asymmetric/composite, \newline dense structure \end{minipage} & \begin{minipage}[t]{\linewidth} asymmetric,\newline thin dense top layer \end{minipage} \\
Separating layer thickness & \begin{minipage}[t]{\linewidth} symmetric 10-150 um, \newline asymmetric 1 um \end{minipage} & 0.1 - 1.0 \textmu m & 0.1 - 1 \textmu m & <1 \textmu m \\
Pore size & 10 - 0.05 \textmu m & 0.05 \textmu m - 1.0 nm & < 2.0 nm & < 2.0 nm \\
Flux in $l/(m^2\cdot h \cdot bar)$ & > 50 & 10 - 50 & 1.4 - 12 & 0.05 - 1.4 \\
\\
Membrane material &
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[noitemsep,leftmargin=*,topsep=0pt,partopsep=0pt]
\item hydrophobic polymeric (PTFE, PVDF, PP, PE)
\item hydrophilic polymeric (cellulose, PC, PSU/PES, PI/PEI, PA, PEEK)
\item ceramic (Al2O3, ZrO2, TiO2, SiC)
\item glass (SiO2), carbon, metals (stainless steel, palladium, tungsten, silver)
\end{itemize}
\end{minipage}
&
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[noitemsep,leftmargin=*,topsep=0pt,partopsep=0pt]
\item polymeric (PSU/PES, PVDF, PAN, cellulose, PE/PEI, PA, PEEK)
\item ceramic (Al2O3, ZrO2)
\end{itemize}
\end{minipage}
&
\multicolumn{2}{c}{
\begin{minipage}[t]{\linewidth}\centering
\begin{itemize}[noitemsep,leftmargin=*,topsep=0pt,partopsep=0pt]
\item integral-asymmetric: \newline
cellulose esters (CDA, CTA), \newline
aromatic PA, \newline
PBI, PAH, PI
\item composites
\end{itemize}
\end{minipage}
}
\\
Characterisation &
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item SEM
\item bubble-point method
\item mercury porometry
\item permeation
\end{itemize}
\end{minipage}
&
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item cuff-off method
\item thermoporometry
\item liquid displacement
\item permporometry
\item gas ad-/desorption
\item permeation
\end{itemize}
\end{minipage}
&
\multicolumn{2}{c}{
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item permeation methods (gas/liquids)
\item DSC/DTA methods
\item density measurements
\item WAXS
\item plasma etching
\item surface analysis
\end{itemize}
\end{minipage}
} \\
Industrial application
&
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item analytical applications
\item sterilisation and clarification (food, beverages, pharmaceuticals)
\item ultrapure water for semiconductors
\item cell harvesting, bioreactor in biotechnology
\item medical application (plasmapheresis)
\item water treatment
\end{itemize}
\end{minipage}
&
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item dairy
\item food (starch, proteins)
\item metallurgy (oil-water emulsions)
\item textile applications
\item pharmaceutical (enzymes, antibiotics)
\item water treatment
\end{itemize}
\end{minipage}
&
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item desalination of brackish water
\item micropollutents removal
\item water softening
\item waste water treatment
\item retention of dyes
\end{itemize}
\end{minipage}
&
\begin{minipage}[t]{\linewidth}\raggedright
\begin{itemize}[leftmargin=*]
\item desalination of brackish and sea water
\item ultrapure water production
\item food juice and sugars concentration
\item milk concentration
\end{itemize}
\end{minipage}
\\
\bottomrule
\multicolumn{5}{p{\dimexpr0.93\linewidth+4\tabcolsep}}{\scriptsize footnote}\\
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}
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