A Study of Pamiparib Combined With Abiraterone Acetate in Neoadjuvant Treatment of Prostate Cancer

the main purpose: To evaluate the pathological response rate of pamiparib combined with abiraterone acetate in neoadjuvant treatment of surgically resectable high-risk or very high-risk prostate cancer after radical prostatectomy; Note: pathological response rate = pathological complete response rate (pCR) + minimal residual disease (MRD)(defined as residual tumor with the largest crosssection dimension ≤5 mm OR RCB≤0.25CM³) Secondary purpose: 1. To evaluate the safety of pamiparib combined with abiraterone acetate as neoadjuvant therapy for high-risk or very high-risk prostate cancer; 2. To evaluate the rate of PSA biochemical recurrence-free survival (bPFS) at 1 year after radical prostatectomy in neoadjuvant treatment of high-risk or very-high-risk prostate cancer with pamiparib combined with abiraterone acetate; 3. The positive rate of surgical margins in radical prostatectomy; 4. Downstaging rate of radical prostatectomy; 5. Pathological response rate of neoadjuvant patients with HRR gene mutation;