在chrome等浏览器的adblock插件里手工添加下列规则就可以
news.163.com##DIV[id="ajax-jpb"]
news.163.com##DIV[id="olympic_floter_medals"]
news.163.com##DIV[id="olympic_floater_wrap"]
news.163.com##DIV[class="main-nav"]
news.163.com##DIV[class="london2012-main"]
news.163.com##DIV[class="clearfix"]
news.163.com##LI[class="clearfix left"]