如何显示x轴刻度最后一个值对应的Y轴上的点echarts 折线配置项内容和展示

x轴上刻度的最大值有showMaxLabel: true,可以强制显示；Y轴上的曲线的点如何显示出来，目前是隔一个坐标显示一个点

      option = {
    title: {
        text: '未来一周气温变化',
        subtext: '纯属虚构'
    },
    tooltip: {
        trigger: 'axis'
    },
    legend: {
        data:['最高气温','最低气温']
    },
    toolbox: {
        show: true,
        feature: {
            dataZoom: {
                yAxisIndex: 'none'
            },
            dataView: {readOnly: false},
            magicType: {type: ['line', 'bar']},
            restore: {},
            saveAsImage: {}
        }
    },
    xAxis:  {
        type: 'category',
        'axisLabel': {
        //是否显示最大 tick 的 label -->没仔细看文档，这个echarts属性太多了
          showMaxLabel: true,
        },
        // 我把月的数据拷贝过来，就是最后一天11.16调不出来
        data: ["10.18", "10.19", "10.20", "10.21", "10.22", "10.23", "10.24", "10.25", "10.26", "10.27", "10.28", "10.29", "10.30", "10.31", "11.1", "11.2", "11.3", "11.4", "11.5", "11.6", "11.7", "11.8", "11.9", "11.10", "11.11", "11.12", "11.13", "11.14", "11.15", "11.16"]
    },
    yAxis: {
        type: 'value',
        axisLabel: {
            formatter: '{value} °C'
        }
    },
    series: [
        {
            name:'最高气温',
            type:'line',
            data:[11, 11, 15, 13, 12, 13, 10, 15, 13, 12, 13, 10, 15, 13, 12, 13, 10, 13, 10, 15, 13, 12, 13, 10, 10, 16, 15, 13, 12, 13, 10, 10, 16],
            markPoint: {
                data: [
                    {type: 'max', name: '最大值'},
                    {type: 'min', name: '最小值'}
                ]
            },
            markLine: {
                data: [
                    {type: 'average', name: '平均值'}
                ]
            }
        },
        {
            name:'最低气温',
            type:'line',
            data:[1, -2, 2, 5, 3, 2, 0, 2, 5, 3, 2, 0, 2, 0, 2, 5, 3, 2, 0, 0, 2, 5, 3, 2, 0, 2, 5, 3, 2, 3, 0, 1, 6],
            markPoint: {
                data: [
                    {name: '周最低', value: -2, xAxis: 1, yAxis: -1.5}
                ]
            },
            markLine: {
                data: [
                    {type: 'average', name: '平均值'},
                    [{
                        symbol: 'none',
                        x: '90%',
                        yAxis: 'max'
                    }, {
                        symbol: 'circle',
                        label: {
                            normal: {
                                position: 'start',
                                formatter: '最大值'
                            }
                        },
                        type: 'max',
                        name: '最高点'
                    }]
                ]
            }
        }
    ]
};