Word如何在与文本同行的位置添加符号？(VB.NET - WORD)

Imports Microsoft.Office.Interop.Word

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim wordApp As New Microsoft.Office.Interop.Word.Application()
        Dim wordDoc As Microsoft.Office.Interop.Word.Document = wordApp.Documents.Add()

        Dim paragraph As Microsoft.Office.Interop.Word.Paragraph = wordDoc.Content.Paragraphs.Add()
        paragraph.Range.Text = "这是一段文本。"

        Dim symbolRange As Microsoft.Office.Interop.Word.Range = paragraph.Range
        symbolRange.Start = symbolRange.End - 1
        symbolRange.Text = "符号"

        wordApp.Visible = True
    End Sub
End Class