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MX  门槛=20%  门=cost>80  步长 up=0.3 down=0.3  条数=6
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20230610_ManalPromotion / Slot car race set词组
  kw    autopista electrica             7.80 → 8.10    up    acos=16.0%   cost=264.17   clicks=89
  kw    pista carros electrica          0.40 → 0.44    up    acos=16.4%   cost=345.12   clicks=87

SP Campaign Recommendation - Suggested Products - 03/30/2022 a70a69 / AGM MASTECH - Slot Cars/Racing
  kw    agm                            21.20 → 18.80   down  acos=72.9%   cost=1786.95  clicks=1037
  kw    agm mastech                    29.00 → 26.60   down  acos=inf     cost=398.29   clicks=140
  kw    pista electrica de carreras     3.92 → 3.02    down  acos=inf     cost=89.22    clicks=16

20230610_ManalPromotion / Slot car race set精准
  kw    agm                             4.07 → 3.17    down  acos=inf     cost=102.98   clicks=156

[MX] 过暗闸拦截 1 条（bid 已低于自均 CPC 的 1/3，再降也拿不到量，停止降价）：
  kw    pista de carreras f1         bid=1.82   自均CPC=7.091   比值=1/3.9  acos=inf     20230610_ManalPromotion / Slot car rac