Please assess the completion status of the following clinical trial:

Trial Title: BuCY vs TBICY Conditioning Regimen for Standard-risk ALL Undergoing Allo-HSCT

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Standard-risk ALL~* Achieving CR1~* Undergoing HLA-matched allo-HSCT (related or unrelated)~Exclusion Criteria:~* Any abnormality in a vital sign (e.g., heart rate, respiratory rate, or blood pressure)~* Patients with any conditions not suitable for the trial (investigators' decision)

- Gender: ALL
- Minimum Age: 14 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- BUCY (Type: EXPERIMENTAL): For standard-risk ALL undergoing HLA-matched allo-HSCT，BUCY conditioning regimen was BU 3.2 mg/kg/day on days -7 and -4；CY 60 mg/kg/day on days -3 and -2.
- TBICY (Type: ACTIVE_COMPARATOR): For standard-risk ALL undergoing HLA-matched allo-HSCT，TBICY conditioning regimen was 4.5 Gy TBI/day on days -5 and -4；CY 60 mg/kg/day on days -3 and -2.

Based on this trial design, predict the completion outcome and termination type (if applicable).