data <- data.frame(item = c("中部","环渤海","华南","西北","华南","华南"),
subitem = c("安徽","北京","福建","甘肃","广东","广西"),
point1 = c(1,604,975,85,315,987),
point2 = c(341,293,998,270,501,363),
Ratio = c(20%,-17%,-48%,15%,-14%,-2%))


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