How to change CSS in Column 2

I am using a Configuration list. I have written the CSS for Column 1 to change each entry into the list as static, but now I don't know how to set it up for Column 2. Will you please show me the code for doing the same thing for column 2. 

You can add td tag after first-child.

Example:

tr+tr+tr >:first-child+td,

tr+tr+tr+tr >:first-child+td{

visibility:hidden;    

}

tr+tr+tr >:first-child+td :before {

    visibility: visible;

    content: "4-6";

}

tr+tr+tr+tr >:first-child+td :before {

    visibility: visible;

    content: "7-9";

}

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By the way, the following should also work. I think this is already supported in all updated browsers.

Instead of using the old fashioned way:

tr+tr+tr >:first-child+td

You can use:

tbody:nth-child(3) >:first-child+td

3 is basically the number of tr used

Hope this helps!