Clinical Study of Orelabrutinib Combined With BG Regimen First-line Treatment of CLL/SLL

"Drug: Orelabrutinib Orelabrutinib 200mg, po, qd，C2-C7. Twenty-eight days for a cycle.~Drug: BG Bendamustin 70mg/m2, IV, d2\&d3 inC1, and then d1\&d2 inC2-6.Twenty-eight days for a cycle.~Obintuzumab 100mg IV, d1, 900mg d2, 1000mg d8\&d15 in C1, and then 1000mg/m2 IV, d1 in C2-6. Twenty-eight days for a cycle."