Intensive Therapy Combined With Venetoclax for Adult Acute Myeloid Leukemia

300 patients will be randomly distributed into the control group (n=150) and the experimental group(n=150). Patients will receive two cycles of induction chemotherapy. The control group receives standard 3+7 induction regimen containing cytarabine (100mg/m2 d1-7) and daunorubicin (60mg/m2 d1-3). The experimental group receives venetoclax combined with intensive chemotherapy (3+7 induction regimen same as the control group). For each group, patients who fail to achieve CR/CRi after two courses of induction therapy may receive alternative therapy decided by their physicians. After CR/CRi achieved, subjects proceed allo-transplantation or consolidation therapy according to their ELN risks: subjects in favorable risk group should continue with chemotherapy; subjects in poor risk group should go through transplantation; for subjects in intermediate risk group, those with suitable donors can receive transplantation while others can continue with consolidation therapy. Subjects receive 3 courses of intermediate-dose cytarabine (1.5g/m2 q12h d1, 3, 5) for age\>55 years or high dose cytarabine (3g/m2 q12h d1, 3, 5) for age≤ 55 years as consolidation therapy with venetoclax in experimental group and without venetoclax in control group. After consolidation, patients will be observed.