在wpf中，如何将运行背景高度设置为行高？

Question

有没有办法将Height元素的背景Run设置为与WPF中的LineHeight相同？这是我的问题的演示，黄色背景是我的预期高度。 Demo of my question

    <RichTextBox IsReadOnly="True" Focusable="False" BorderThickness="0">
    <FlowDocument>
        <Paragraph LineHeight="30" LineStackingStrategy="BlockLineHeight">
            <Run>How to set the run element background height as LineHeight?</Run>
            <Run Background="Gray">How to set the run element background height as LineHeight?</Run>
            <Run>How to set the run element background height as LineHeight?</Run>
        </Paragraph>
    </FlowDocument>
</RichTextBox>