line 折线上显示数值，但是过多的数值重叠了echarts 配置项内容和展示

老的版本会优化，只显示x轴有显示的坐标数值。反倒是新版会有这个问题。

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    "tooltip": {
        "trigger": "axis"
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    "legend": {
        "data": []
    },
    "color": ["#5f94d4", "#d7605d", "#afcf69", "#b297d2", "#55bedc", "#ffa154"],
    "grid": {
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        "right": 30,
        "bottom": 35,
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    "xAxis": [{
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        "type": "category",
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        "name": "销量（件）",
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        "splitLine": {
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