相邻的兄弟选择器和：在Chrome 10中的伪元素之前。

#profiletext ol li:before {
    content: \'A\';
    }

#profiletext ol li+li:before {
    content: \'B\';
    }

#profiletext ol li+li+li:before {
    content: \'C\';
    }

#profiletext ol li+li+li+li:before {
    content: \'\';
    }

#profiletext ol li+li+li+li {
    background: url(\'/wp-content/themes/paz2010/images/sweet-spot.png\') no-repeat;
    margin-left: 0;
    padding-left: 38px;
    }

#profiletext ol li {
    height: 30px;
    margin-left: 10px;
    }