修正

src/views/nav/index.vue

@@ -1,6 +1,5 @@
<template>
<el-menu style='display:flex'
  :default-active="activeIndex2"
  class="el-menu-demo"
  mode="horizontal"
  @select="handleSelect"
@@ -8,22 +7,17 @@
  text-color="#fff"
  active-text-color="#ffd04b">
  <el-menu-item index="/show/home" router>首页</el-menu-item>     
  <el-menu-item index="/show/medicalTreatment" router>协同诊疗</el-menu-item>   
  <el-menu-item index="/show/intelligentJudgment" router>AI智能判断</el-menu-item>      
  <el-menu-item index="/show/sharedDevice" router>共享器械</el-menu-item>
  <el-menu-item index="/show/hospital" router>医院</el-menu-item>
  <el-menu-item index="/show/medicalTreatment" route>协同诊疗</el-menu-item>   
  <el-menu-item index="/show/intelligentJudgment" route>AI智能判断</el-menu-item>      
  <el-menu-item index="/show/sharedDevice" route>共享器械</el-menu-item>
  <el-menu-item index="/show/hospital" route>医院</el-menu-item>
</el-menu>
</template>
<script>
  export default {
    data() {
      return {
        activeIndex: '1',
        activeIndex2: '1'
      }
    },
    methods: {
      handleSelect(key, keyPath) {
        this.$router.push(key)
      }
    }
  }