Tikz 多条形图自定义条形位置

Question

我有一个包含单条和多条的多条图：

我想将单条 A 和 D 置于中心；现在它们是左对齐的。

以下是代码：

\begin{tikzpicture}
        \begin{axis}[
        ybar, axis on top, height=8cm, width=8cm, bar width=0.6cm,  ymajorgrids, tick align=inside,
        major grid style={draw=white}, enlarge y limits={value=0.1,upper}, ymin=0, ymax=40,
        axis x line*=bottom, axis y line*=left, y axis line style={opacity=0}, tickwidth=0pt, 
        enlarge x limits=true, 
        ylabel={Percentage (\%)}, 
        ylabel style={align=center},
        symbolic x coords={
            A,B,C,D
        },
        xtick=data,
        nodes near coords={
            \pgfmathprintnumber[precision=1]{\pgfplotspointmeta}
        },
        x tick label style={font=\small,text width=2cm,align=center}
        ]
        \addplot [draw=none, fill=blue!60] coordinates {
            (A, 25.6)
            (B, 10.3) 
            (C, 35.7)
            (D, 22.4)  };
        \addplot [draw=none,fill=red!30,opacity=1] coordinates {
            (B, 19.6) 
            (C, 26.1) };
        \end{axis}
        \end{tikzpicture}