快速创建结点

\begin{document}
	\begin{tikzpicture}[scale=2, line width=1.5pt,
		every node/.style={draw=black, circle, very thick,font =\huge, minimum size=3em},
		arrow/.style={-latex, red}
	]
 
	% 使用箭头连接节点，并在箭头之间创建节点
	\draw[arrow,shorten >=1.5em, shorten <=1.5em] (0,0) node (A) {A} -- (2,0) node (B) {B} -- (4,0) node (C) {C};
	%\draw[arrow, shorten >=1ex] (0,0) -- (2,-2) node (D) {D};
	%\draw[arrow] (C) -- (D);
	\end{tikzpicture}
 
\end{document}