与模型的具体对齐

Question

我试图获得下图所示的结果，一个字母左对齐（没有 alinea）并且文本以相同长度开始。我应该使用枚举吗？

我将非常感激您的帮助:)

Answer 1

\documentclass{article}
\usepackage{enumitem}
\begin{document}
\noindent\hrulefill% REMOVE THIS TO GET RID OF LINE
\begin{itemize}[align=left,itemsep=-3pt]
\item[$\theta$] Shape parameter in using the relationship between
  the additional sales price and product...
\item[$A$] Ordering cost per order...
\item[$B$] Promotional budget...
\item[$C$] Annual purchasing cost...
\item[$H$] Annual holding cost...
\end{itemize}
\end{document}