Please assess the completion status of the following clinical trial:

Trial Title: Transbucal Dexmedetomidine for Prevention of Sevoflurane Emergence Agitation in Pre-school Children

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2/PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* ASA physical status I-II patients~* aged 2-6 years~* patient scheduled for elective tonsillectomy due to recurrent~* chronic tonsillitis~Exclusion Criteria:~* patients with known hypersensitivity to medication drugs~* coagulation disorders~* thrombocytopenia~* significant cardiac~* renal~* pulmonary~* hepatic disease

- Gender: ALL
- Minimum Age: 2 Years
- Maximum Age: 6 Years
- Healthy Volunteers: f

Study Arms:
- DEX I (Type: ACTIVE_COMPARATOR): active comparator receive 0.5µg/kg dexmedetomidine orally half an hour before operation
- Saline Control (Type: PLACEBO_COMPARATOR): 2ml oral 0.9%saline half an hour before operation
- DEX II (Type: ACTIVE_COMPARATOR): active comparator receive,1µg/kg dexmedetomidine orally half an hour before operation

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