renderHeader(h,{column,$index}){

      return h(
        'div',
        {class:'',
        style:"padding-top:4px;"
        },
        [ 
          h('el-tooltip',
           {
             props:{
                content:"若设置结算时间，每天实际统计时间：从结算时间起24小时为一天",
                placement:"top",
                effect:"light",
             },
           },
           [
            h('span',{
            
            },[
                h('span',"日期"),
                h('i', {
                class:'cursorPointer fa fa-question-circle colorFE7F76',
                style:'margin-left:6px;',
                }),
            ]),
             
           ],
          ),
          
       ],
      );
    },