vue问题:如何把optins的答案选项 拆开循环显示

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>

</head>
<body>
    <div id="app">
            <div v-for="as in products">
                <div class="title">{{ as.title}}</div>
                <ul>
                    <li>{{ as.options }}</li>
                </ul>
            </li>           
    </div>
    <script src="https://unpkg.com/vue"></script>
    <script type="text/javascript">
        const app = new Vue({
            el: '#app',
            data: {
                products:[]

            },
            created() {
                fetch('https://ser-html5.8531.cn/dl/yzw-dati/init.php?username='+Math.random())
                .then(response => response.json())
                .then(json => {
                    this.products = json.data;
                })
            }
        })
    </script>
</body>
</html>

遍历json

<li v-for="(k,item) in  as.options">
        {{k}} {{item}} 
</li>