text: option = {
      tooltip: {
          trigger: 'item',
          formatter: "{a} <br/>{b}: {c} ({d}%)"
      },
      legend: {
          orient: 'vertical',
          x: 'left',
          data:['直达','营销广告','搜索引擎','邮件营销','联盟广告','视频广告','百度','谷歌','必应','其他']
      },
      series: [
          {
              name:'访问来源',
              type:'pie',
              selectedMode: 'single',
              radius: [0, '30%'],
  
              label: {
                  normal: {
                      position: 'inner'
                  }
              },
              labelLine: {
                  normal: {
                      show: false
                  }
              },
              data:[
                  {value:335, name:'直达', selected:true},
                  {value:679, name:'营销广告'},
                  {value:1548, name:'搜索引擎'}
              ]
          },
          {
              name:'访问来源',
              type:'pie',
              radius: ['40%', '55%'],
  
              data:[
                  {value:335, name:'直达'},
                  {value:310, name:'邮件营销'},
                  {value:234, name:'联盟广告'},
                  {value:135, name:'视频广告'},
                  {value:1048, name:'百度'},
                  {value:251, name:'谷歌'},
                  {value:147, name:'必应'},
                  {value:102, name:'其他'}
              ]
          }
      ]
  };