如何使用Open XML SDK 2.0在Excel 2007中向单元格添加注释？

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

// 打开Excel文档
using (SpreadsheetDocument document = SpreadsheetDocument.Open("path_to_excel_file.xlsx", true))
{
    // 获取工作簿
    WorkbookPart workbookPart = document.WorkbookPart;
    WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();

    // 获取要添加注释的单元格
    Cell cell = worksheetPart.Worksheet.Descendants<Cell>()
        .FirstOrDefault(c => c.CellReference.Value == "A1");

    // 创建注释对象
    Comment comment = new Comment();
    comment.AuthorId = 0;

    // 创建注释文本
    CommentText commentText = new CommentText();
    commentText.Text = "这是一个注释";

    // 将注释文本添加到注释对象中
    comment.Append(commentText);

    // 将注释对象添加到单元格中
    cell.Append(comment);

    // 保存Excel文档
    worksheetPart.Worksheet.Save();
}