using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string filePath = "path_to_your_docx_file.docx";
        string searchText = "text_to_replace";
        string replaceText = "$0.00";

        using (WordprocessingDocument doc = WordprocessingDocument.Open(filePath, true))
        {
            // 获取文档中的所有段落
            var paragraphs = doc.MainDocumentPart.Document.Body.Elements<Paragraph>();

            foreach (var paragraph in paragraphs)
            {
                // 获取段落中的所有文本
                var texts = paragraph.Descendants<Text>();

                foreach (var text in texts)
                {
                    // 使用正则表达式替换文本
                    text.Text = Regex.Replace(text.Text, searchText, replaceText);
                }
            }

            // 保存修改后的文档
            doc.Save();
        }
    }
}