<div id="app">
    <span v-if="score>=85">优秀</span>
    <span v-else-if="score>=75">良好</span>
    <span v-else-if="score>=60">及格</span>
    <span v-else>不及格</span>
</div>
    
<script src="https://unpkg.com/vue@next"></script>
<script>
    const app = Vue.createApp({
        data() {
            return {
                score: 90
        }
    }
    }).mount('#app')
</script>