如何通过google script (gs)以文本文件的形式读取整个google电子表格(按行)

function readSpreadsheetAsText() {
  var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = spreadsheet.getActiveSheet();
  var range = sheet.getDataRange();
  var values = range.getValues();
  
  var text = "";
  
  for (var i = 0; i < values.length; i++) {
    text += values[i].join("\t") + "\n";
  }
  
  return text;
}

function exportSpreadsheetAsText() {
  var text = readSpreadsheetAsText();
  var folder = DriveApp.getRootFolder(); // 可以根据需要更改为其他文件夹
  var file = folder.createFile("spreadsheet.txt", text, "text/plain");
  
  Logger.log("文件已导出：" + file.getUrl());
}