The patient is seriously ill and is being kept under continuous observation.
病人病情严重，现在正在接受持续观察。
The control group not given special treatment, continuous observation of 1 ~ 3 years.
对照组未进行高压氧治疗，连续观察1 ~3年。
The control group not given special treatment, continuous observation of 1 ~ 3 years.
对照组未进行高压氧治疗，连续观察1 ~3年。
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