答案1
不完美的提议,但可以作为开始
\documentclass{article}
\usepackage{pgf,tikz}
\usetikzlibrary{positioning,shapes,fit,calc}
\begin{document}
\begin{tikzpicture}
\node [draw,ellipse,minimum width=8cm,minimum height=3cm,thick](ell) at (0,0){};
\draw[orange,ultra thick] (ell.150) to [out=-90, in=70] coordinate[pos=0.35](p1)(ell.220);
\draw[orange,ultra thick] (p1) to [out=10, in=100] (ell.310) coordinate[pos=0.55](p2);
\draw[orange,ultra thick] (p2) to [out=45, in=-90] (ell.60) coordinate[pos=0.6](p3);
\end{tikzpicture}
\end{document}