google sitelinks相关

一直很奇怪google的sitelinks是干嘛的，且以前连这个专有名词也不知道怎么描述，翻了别人的帖子，终于有所悟，在第一个搜索这个问题的着陆点（http://www.mattcutts.com/blog/ui-fun-better-snippets/）啃吃啃吃写了好多英文的回帖，竟然post不过去。。。。辛勤劳动别浪费了，记在这里
好文章：
http://www.lesishu.cn/google/google-sitelinks/
看了之后结合我自己的一些经验：
a good article to explain this problem,but in Chinese(Chinese simplified),you can use online translator to help.It maybe not the ultimate algo of sitelinks.But can be proved.My ex-company's site www.guolairen.com (search guolairen in google)walked through the whole process.Ten monthes ago,the site's alexa ranking was  about 100,000,and had no sitelinks at that time.Now the ranking is about 10,000 with sitelinks.Our pr is only 4,sometimes 5.So the pr is not key course.For another instance,search "nwpu" in google,it's a Chinese University website with low ranking and small traffic.But you can see,the keyword "nwpu" is very unique for the university site.
So I surpose that :
1.traffic and pr is not too bad
2.sub-domain sites is prefered,don't make all pr and traffic in one page,optimize it as possible.
3the keywords(html title,h1 tag,html keyword property in meta data) in your site make the disicion.So don't use too popular keywords in your site.And make it unique.
As for your keywords ,it's two-step walk:
1pick up your unique keywords,
2enhance them.
it's not difficult to enhance the ranking.My ex-company hire one man.His position doesn't cost much.He kept calling other related sites having high pr,and tell them we have a pr=6 page(fortunately ten monthes ago we kept our eggs in one basket,and the homepage's pr is 6,but.....inside pages are all zero....).So everyday lots of sites exchange links with us.For example we exchange "full-time job recruitment" with recruitment sites,and exchange "digital magzine" with media sites.
pls forgive my poor English,good luck to everyone