如果我记得，我相信您可以创建一个新的regexp对象并在此处使用exec.

If I recall, I believe you can create a new regexp object and use exec here.

var re = new RegExp('\\bmicssys\\b','gi');

var match;
var bodyElement = DocumentApp.getActiveDocument().getBody();
while (match = re.exec(bodyElement)) {
   // match[0] will return the found results
}

注意:您可能必须使用getText()以文本字符串的形式检索元素的内容，然后进行匹配.

Note: You may have to use getText() to retrieve the contents of the element as a text string and then match against.