<el-checkbox-group v-model="checkList">  <el-checkbox :label="emr.hospital_id"  :key="emr.hospital_id"                      @change="checkbox(emr)" v-model="check"                       style="float: right;margin-top:49px"                        v-if="showSelected===true"         >         </el-checkbox>  </el-checkbox-group>const hosList = [];  for (let i = 0; i < this.emrList.length; i++) {     hosList.push(this.emrList[i].hospital_id);   }  this.checkList = val ? hosList : [];這段代碼寫完之后，點擊外層得得復選框，里層得復選框會多出來id，只想要復選框怎么改？