document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=63573\">发达国家浪费的食物最多</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=63575\">声称完美保密的新加密方法引发怀疑</a></p></div>");