Experimental: (near)ETP-ALL

All T-ALL patients will receive 8 mg/m2/day dexamethasone in induction therapy. For all ETP/near-ETP T-ALL patients, venetoclax will replace daunorubicin in induction therapy. CAT will replace CAT+ during early intensification. Venetoclax will replace daunorubicin in interim therapy 2 and 4. In maintenance therapy 2, the CTX+Ara-C treatment cycles are reduced to 5, in order to minimize the impact of alkylating agents on fertility.

Experimental: nonETP-TALL-Das Group

All T-ALL patients will receive 8 mg/m2/day dexamethasone in induction therapy. All non-ETP T-ALL patients will receive dasatinib after initial window phase in induction therapy. For non-ETP T-ALL patients with MRD \<0.01% on day 46, CAT will replace CAT+ during early intensification, and patients will be continuously subjected to dasatinib combined with chemotherapy during early intensification, interim tharapy, reinduction therapy and maintenance therapy. In maintenance therapy 2, the CTX+Ara-C treatment cycles are reduced to 5, in order to minimize the impact of alkylating agents on fertility.

Experimental: nonETP-TALL-HHT Group

All T-ALL patients will receive 8 mg/m2/day dexamethasone in induction therapy. All non-ETP T-ALL patients will receive dasatinib after initial window phase in induction therapy. For non-ETP T-ALL patients with MRD ≥0.01% on day 46，CAT+ will be replaced with randomized doses of homoharringtonine (HHT) during early intensification, and HHT will be administrated during reinduction therapy. In maintenance therapy 2, the CTX+Ara-C treatment cycles are reduced to 5, in order to minimize the impact of alkylating agents on fertility.