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MX  门槛=20%  门=cost>80  步长 up=0.3 down=0.3  条数=3
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20230610_ManalPromotion / Slot car race set词组
  kw    pista carros electrica          0.53 → 0.58    up    acos=13.4%   cost=280.77   clicks=72
  kw    autopista electrica             8.70 → 9.00    up    acos=16.9%   cost=278.48   clicks=100

SP Campaign Recommendation - Suggested Products - 03/30/2022 a70a69 / AGM MASTECH - Slot Cars/Racing
  kw    agm                            14.00 → 11.60   down  acos=74.6%   cost=1828.85  clicks=1068

[MX] 过暗闸拦截 2 条（bid 已低于自均 CPC 的 1/3，再降也拿不到量，停止降价）：
  kw    agm mastech                  bid=0.5    自均CPC=2.712   比值=1/5.4  acos=inf     SP Campaign Recommendation / AGM MASTECH 
  kw    agm                          bid=0.21   自均CPC=0.680   比值=1/3.2  acos=inf     20230610_ManalPromotion / Slot car rac