document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=75421\">长寿因子 klotho 改善了老年灵长类动物的认知</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=75423\">巨齿鲨是温血动物</a></p></div>");