var allTextNodes = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT),
    tmptxt,
    tmpnode,
    cakeRE = /专利|唯一|领先|第一|一流|首个|卓越|绝对|首次|首选|独家|独有|最|极/g
    replaceValue = " ";

while (allTextNodes.nextNode()) {
    tmpnode = allTextNodes.currentNode;
    tmptxt = tmpnode.nodeValue;
    tmpnode.nodeValue = tmptxt.replace(cakeRE, replaceValue);
}