<w:r w:rsidRPr="000308EB" xmlns:w="http://www.microsoft.com/wordnamespace">
    <w:rPr>
        <w:rFonts w:ascii="Times_CSX" w:hAnsi="Times_CSX" w:cs="宋体"/>
        <w:sz w:val="36"/>
        <w:szCs w:val="36"/>
    </w:rPr>
    <w:t xml:space="preserve">U+91 ‘ </w:t>
</w:r>

XSL:
===============================================

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:w="http://www.microsoft.com/wordnamespace">
    
    <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
    
    <xsl:template match="w:*">
        <xsl:element name="{name()}" namespace="http://www.microsoft.com/wordnamespace">
            <xsl:apply-templates select="node()|@*"/>
        </xsl:element>
    </xsl:template>
    
    <xsl:template match="@w:*">
        <xsl:attribute name="{name()}" namespace="http://www.microsoft.com/wordnamespace">
           <xsl:value-of select="."/>
        </xsl:attribute>
    </xsl:template>
    
    <xsl:template match="w:t">
        <xsl:if test="preceding-sibling::w:rPr/w:rFonts/@w:ascii='Times_CSX' and
            preceding-sibling::w:rPr/w:rFonts/@w:hAnsi='Times_CSX' and
            preceding-sibling::w:rPr/w:rFonts/@w:cs='宋体' ">
            <w:t xml:space="preserve"></w:t>
            <xsl:text>a</xsl:text>
        </xsl:if>
        
    </xsl:template>
</xsl:stylesheet>