刚开始设置了半天都不展示单位，后来发现是被挡住了，需要调高top值

// 基于准备好的dom，初始化echarts实例var myChart = echarts.init(document.getElementById("echartD"));rankOption = {//  backgroundColor: '#00265f',tooltip: {trigger: "axis",axisPointer: {type: "shadow"}},grid: {left: "0%",top: "50px",//增加这个值right: "0%",bottom: "2%",containLabel: true},

   yAxis: [{name: "单位 ： 总里程(KM)",nameTextStyle: {color: "rgba(255,255,255,.6)",fontSize: 14,padding: [0, 0, 10, -30] //name文字位置 对应 上右下左},

          axisLine: {show: true,lineStyle: {color: "rgba(255,255,255,.1)",width: 1,type: "solid"}},axisTick: {show: false},axisLabel: {interval: 0,rotate: 40,show: true,splitNumber: 15,textStyle: {color: "rgba(255,255,255,.6)",fontSize: "12"}}