谁能给分析一下为什么一个这样写data.name一个这样写sport["name"]

         $(function () {
                $("#btnShow").bind("click", function () {
                    var $this = $(this);
                    $.get("http://www.imooc.com/data/info_f.php",function(data){
                        $this.attr("disabled", "true");
                        $("ul").append("<li>我的名字叫：" + data.name + "</li>");
                        $("ul").append("<li>男朋友对我说：" + data.say+ "</li>");
                    }, "json");
                })
            });
            
            
            
            
            $(function () {
                $("#btnShow").bind("click", function () {
                    var $this = $(this);
                    $.getJSON("http://www.imooc.com/data/sport.json",function(da){
                        $this.attr("disabled", "true");
                        $.each(da, function (index, sport) {
                            if(index==0)
                            $("ul").append("<li>" + sport["name"] + "</li>");
                        });
    
                    });
                })
            });