Please assess the completion status of the following clinical trial:

Trial Title: A Trial of Dexmedetomidine Hydrochloride Nasal Spray in Preoperative Sedation of Children

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

Eligibility Criteria:
Inclusion Criteria:~1. Able and willing to provide a written informed consent~2. Male or female~3. Subjects requiring elective general anesthesia surgery~4. Conform to the ASA Physical Status Classification~5. Meet the weight standard~Exclusion Criteria:~1. Not suitable for nasal spray~2. Pediatric populations requiring special care or court/social welfare supervision~3. Subjects who had been under general anesthesia when they were randomized~4. Subjects with a history of mental illness and a history of cognitive impairment epilepsy~5. Subjects with cardiovascular disease~6. Subjects whose hemoglobin is below the lower limit of normal~7. Subjects with a history or possibility of a difficult airway~8. Abnormal liver function and/or abnormal renal function~9. Adrenoceptor agonists or antagonists or analgesics were used before randomization~10. Participated in clinical trials (received experimental drugs)~11. History of hypersensitivity to drug ingredients or components~12. Other circumstances that the investigator judged inappropriate for participation in this clinical trial

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

Study Arms:
- Dexmedetomidine Hydrochloride Nasal Spray (Type: EXPERIMENTAL): None
- Dexmedetomidine hydrochloride nasal spray blank preparation (Type: PLACEBO_COMPARATOR): None

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