points=[[53.2, 163.0 , 168.6 , 6004 , 5 , 6.5 ],
[ 18.5 , 14.5 , 22.5 , 209 , 11 , 16.0 ],
[ 11.3, 88.2 , 109.4, 1919 , 10 , 18.2 ],
[4.7, 151.6, 277.0, 7287, 7 , 10.0 ],
[.3, 79.1 , 17.4 , 5311 , 15 , 17.5],
[17.9, 60.4 , 93.0 , 6109, 8 , 3.6],
[2.5, 53.2 , 21.5 , 4057, 17, 18.5 ],
[7.3 , 108.5, 114.5, 4161 , 3 , 4.0 ],
[.9 , 48.7, 61.3, 2166, 10, 11.6],
[23.9, 142.8, 129.8 , 11125, 9, 14.2 ],
[9.4, 214.7, 159.4 , 13937 , 2, 2.5],
[20.6 , 65.6, 91.0, 4000 , 18 , 12.0 ],
[.9, 13.2, 6.1, 2841, 14 , 12.8],
[3.0 , 60.9 , 60.3, 1273 , 26 , 7.8 ],
[.3, 21.2 , 51.1, 2404, 34, 2.7 ],
[6.2 , 114.3, 73.6, 6109, 12, 3.2],
[78.8, 299.5, 171.7 , 15571, 4, 7.6],
[11.1 , 78.9, 38.8 , 4228 , 11 , 11.0 ],
[.6, 90.0, 105.3 , 3772 , 15, 28.4 ],
[8.9 , 160.3 , 161.5, 6451, 5 , 6.2],
[ 22.1, 84.0 , 122.6, 3275, 9, 10.8],
[ 11.1 , 78.9 , 38.8 , 4228, 10 , 33.7 ],
[ 8.6, 90.0 , 105.3, 3772, 14 , 16.5],
[ 48.9, 160.3 , 161.5, 6451, 6, 9.3 ],
[ 22.1 , 84.0 , 122.6, 3275 , 10, 11.6]]
我想要提出每一组数据的第二项，再求每一个的第三项，如何提取？
