优化饼图展示方式

src/app/views/medical-waste-hospital-statistics/medical-waste-hospital-statistics.component.ts

@@ -223,6 +223,7 @@ export class MedicalWasteHospitalStatisticsComponent implements OnInit {
           type: 'pie',
           radius: '50%',
           data: nums,
+          center: ['40%', '50%'],
           emphasis: {
             itemStyle: {
               shadowBlur: 10,
@@ -232,7 +233,7 @@ export class MedicalWasteHospitalStatisticsComponent implements OnInit {
           },
           label: {
             show: true,
-            formatter: "{b} {d}%"
+            formatter: "{b}\n{d}%"
           },
         },
       ],