==============================================================================
MX  门槛=20%  门=cost>80  步长 up=0.3 down=0.3  条数=5
==============================================================================

20230610_ManalPromotion / Slot car race set词组
  kw    pista de carritos               0.30 → 0.33    up    acos=0.0%    cost=0.13     clicks=1
  kw    pista carros electrica          0.64 → 0.70    up    acos=12.1%   cost=254.05   clicks=66
  kw    autopista electrica             9.30 → 9.60    up    acos=14.7%   cost=459.92   clicks=155

SP Campaign Recommendation - Suggested Products - 03/30/2022 a70a69 / AGM MASTECH - Slot Cars/Racing
  kw    pista electrica de carreras     3.02 → 3.32    up    acos=5.3%    cost=110.83   clicks=35
  kw    agm                             1.40 → 0.98    down  acos=87.5%   cost=1890.31  clicks=1118

[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=2.763   比值=1/5.5  acos=inf     SP Campaign Recommendation / AGM MASTECH 
  kw    agm                          bid=0.21   自均CPC=0.684   比值=1/3.3  acos=inf     20230610_ManalPromotion / Slot car rac