=========跟单区（id,item, qty, link, price, contact)=============
跟单
1， GNC Triple Lecithin 1200 100 Softgel Capsules（要是可以下180粒的就要180粒的）
qty:4
price: 12.99
link: http://www.gnc.com/product/index.jsp?productId=4276333
2, GNC Prenatal Formula with Iron 120 Caplets
qty:2
price: 19.99
link: http://www.gnc.com/product/index.jsp?productId=4272005
contact: 82180256
qty:4
price: 12.99
link: http://www.gnc.com/product/index.jsp?productId=4276333
2, GNC Prenatal Formula with Iron 120 Caplets
qty:2
price: 19.99
link: http://www.gnc.com/product/index.jsp?productId=4272005
contact: 82180256
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