**1) Why Day 7 behavior is high-value** - Completing a post-video survey signals active intent, not passive viewing — the lead is engaging beyond content consumption. - 完成视频后的问卷意味着主动意图，而不只是被动观看——说明该线索在内容之外有真实投入。 **2) Why AI upgrades C → B** - Score jumps to 98, crossing the 60 threshold (from 59 on Day 6); AI reads survey completion as a strong buying-signal multiplier. - 评分跃升至98，越过60的升级阈值（第6天为59）；AI将问卷完成视为强购买信号。 **3) Precise nurturing actions to trigger** - Send a tailored B2B proposal + case studies; create a sales follow-up task; route to B-pool cadence with a qualification call. - 发送定制化B2B方案与案例；创建销售跟进任务；进入B池培育节奏并安排资格确认通话。 **4) Path to a 100-unit inquiry** - High-intent signals + timely proposal compress the sales cycle and raise conversion odds toward the 100-unit deal; next milestone is reaching 120 to upgrade B → A. - 高意图信号配以及时方案可缩短销售周期、提升成交概率；下一里程碑是达到120分升级至A池。