您可以使用 .filter（）以找到完全匹配，：包含选择器也返回部分匹配

You can use .filter() to find an exact match, :contains-selector returns partial matches also

var theText = "Large";
$("#size option").filter(function () {
    return $.trim($(this).text()) == theText;
}).attr('selected', 'selected');

演示：小提琴