Albumin-bound Paclitaxel、Dalpiciclib and AI in ER-Low (1%-10%) HER2-ABC

"Dalpiciclib: 125mg orally, with a treatment cycle every 28 days, with continuous administration for the first 3 weeks (days 1 to 21) and rest (no medication) for the second 1 week (days 22 to 28). It is recommended to take Dalpiciclib at about the same time every day.~Albumin-bound paclitaxel for injection: 125mg/m2, intravenous infusion for 30 minutes, D1, D8, every 28 days for a treatment cycle, at least ≥6 treatment courses.~Endocrine therapy: Endocrine therapy drugs are selected by the investigator"