The observational team used to detain injection punctured eccentric,while the contrastive team used to detain injection punctured eccentric.

 
  • 兩組置管時(shí)間比較,觀(guān)察組優(yōu)于對照組,即觀(guān)察組置管時(shí)間較對照組長(cháng)。
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