1) **Why Day 7 behavior is high value:** Completing a post-video survey signals deep engagement and explicit intent—going beyond passive viewing to commit time and share feedback, a strong buyer readiness indicator. **中文：** 完成视频后问卷表明用户深度参与和明确意向，超越被动观看，是购买意愿增强的可靠信号。 2) **Why AI upgrades from C Pool to B Pool:** The cumulative score hit 59 (just under the 60 threshold), but Day 7’s high-value behavior adds ~39 points, pushing past 98 and clearing the C→B barrier. The system detects acceleration in engagement. **中文：** 累计分达59分（接近60阈值），第7天高价值行为增加约39分，总分98分，触发C→B池升级。系统捕捉到参与意愿加速。 3) **Triggered nurturing actions now:** - Auto-send a **case-study or ROI whitepaper** (not generic brochure) to reinforce value. - Create a **sales task** for account manager to schedule a discovery call within 48 hours. - Flag as “warm lead” for pipeline acceleration. **中文：** 自动推送行业案例或ROI白皮书；设置销售任务48小时内安排需求沟通；标记为“热线索”加速推进。 4) **Why this drives a 100-unit deal:** In B2B training, completing a structured evaluation (survey) often precedes budget discussion. This behavior, combined with score jump, indicates buying team activation. Timely proposal + sales call can advance to a distribution of 100 training seats. **中文：** 完成结构化评估（问卷）常预示预算讨论即将开始。结合分数跃升，表明采购团队已激活，及时跟进方案可推动100席位培训订单转化。