解决echarts中饼图标签重叠的问题

var option = {
    tooltip: {
     trigger: "item",
     formatter: "{a} <br/ {b} : {c} ({d}%)"
    },
    legend: {
     //orient: "vertical",
     x: "0%",
     //y: "25%",
     //y: "5%",
     itemWidth: 14,
     itemHeight: 14,
     align: "left",
     data: xData,
     textStyle: {
      color: "#fff"
     }
    },
    series: [
     {
      name: "危险源状态",
      type: "pie",
      radius: ["25%", "45%"],
      center: ["50%", "60%"],
      avoidLabelOverlap: true,//对，就是这里avoidLabelOverlap
      label: {
       normal: {
        show: true,
        position: "center"
       },
       emphasis: {
        show: true,
        textStyle: {
         fontSize: "12",
         fontWeight: "bold"
        }
       }
      },
      labelLine: {
       normal: {
        show: true
       }
      },
      data: pieData
     }
    ]
   };

// 基于准备好的dom，初始化echarts实例
var colors = ['#0089FF','#B865DF',/*'#5ADF63','#FFDD00',*/'#224666', '#675bba'];
// 指定图表的配置项和数据
option = {
/*grid:{
y:'25%'},*/
color: colors,
/*		 title: {
text: '各医院指标对比情况',
left: 16,
textStyle: {
fontSize: 18,
color:'#0089FF'
}
},*/
tooltip: {
trigger: 'axis',
axisPointer: {
type: 'cross',
crossStyle: {
color: '#999'
}
}
},
legend: {
data:['组数','CMI'],
x:'80%'
},
xAxis: [
{
type: 'category',
data: arr,
axisPointer: {
type: 'shadow'
},
axisLine: {
show: true,
/*  lineStyle: {
color: '#05edfc'
}*/
},
axisLabel: {
show: true,
/* color: '#fff',*/
fontSize: 12,
interval: 0, 
formatter:function(value) 
{ 
return value; 
}
//fontWeight: 'bold'
}
},
],
yAxis: [
{
type: 'value',
name: '组数整体指标',
position: 'left',
splitLine:{show: true},
axisLine: {
show: false,
/* lineStyle: {
color: '#E7E7E7'
}*/
},
axisLabel: {
show:true,
showMinLabel:true,
showMaxLabel:true,
formatter: '{value}'
},
},
{
type: 'value',
name: 'CMI',
position: 'right',
splitLine:{show: true},
axisLine: {
show: false,
/* lineStyle: {
color: '#E7E7E7'
}*/
},
axisLabel: {
show:true,
showMinLabel:true,
showMaxLabel:true,
formatter: '{value}'
},
},
],
series: [
{
name:'组数',
type:'bar',
barWidth : 20,
data:arr2,
yAxisIndex: 0,
/*   markPoint : {
data : [
{type : 'max', name: '最大值'},
{type : 'min', name: '最小值'}
]
}*/
},
{
name:'CMI',
type:'bar',
barWidth : 20,
data:arr3,
yAxisIndex: 1,
/*  markPoint : {
data : [
{type : 'max', name: '最大值'},
{type : 'min', name: '最小值'}
]
}*/
}
]
};