Word选项=>弹出一个对话框,点击“高级”=>在最下面找到”板式选项“=>勾选“为尾部空格添加下划线”
http://jingyan.baidu.com/article/ea24bc39b3cac5da62b331bb.html
转:https://www.cnblogs.com/lmf-techniques/p/6754086.html