.news div{font-size:22px; height:auto; font-weight:bold; font-family:Microsoft YaHei; margin-bottom:2%; margin-left:3%; margin-right:3%; width:94%; padding-top:5%; color:#333; line-height:30px;}
body {margin-left: 0px;margin-top: 0px;margin-right: 0px;margin-bottom: 0px;max-width:640px;margin:0 auto;}
实操策略二：从“关键词密度”到“问题覆盖密度”
$(document).ready(function(){
