Tikz：如何控制圆柱节点顶部的椭圆

Question

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes,positioning}

\begin{document}

\begin{tikzpicture}

\node (A) [cylinder, shape border rotate=90, draw,minimum
height=3cm,minimum width=2cm] {};

\node (B) [cylinder, shape border rotate=90, draw,minimum
height=3cm,minimum width=2cm, below=0.3cm of A]
{Wider?};

\node (C) [cylinder, shape border rotate=90, draw,minimum
height=3cm,minimum width=2cm, below=0.3cm of B]
{Why is the Ellipse wider?};

\end{tikzpicture}

\end{document}

生成：

随着节点内的文本变宽，圆柱节点顶部的椭圆变得不再那么扁。如何控制这一点？

尽管可以拉伸以适合文本，我仍想保持椭圆的大致相同的外观。