階段 2 — 分析線索。完成四個陳述，將疑似肺結核轉化為立即隔離、呼吸防護和診斷行動。

Airborne precautions begin when pulmonary TB is ::선택::suspected from the clinical patternconfirmed by three culturesproven by a positive IGRA, not only after laboratory confirmation. While awaiting AIIR transfer, the client should ::선택::wear a fit-tested N95 continuously in bedwear a mask for source control while the door remains closedremain unmasked so sputum production can be observed. Personnel entering the room should use ::선택::a fit-tested NIOSH-approved N95 or higher-level respiratora surgical mask only if the client is coughingstandard precautions until the NAAT result returns. Respiratory testing should include ::선택::one IGRA followed by no respiratory specimensone smear only if fever persistsat least three sputum specimens 8 to 24 hours apart including one early-morning specimen, with NAA testing on at least one respiratory specimen when indicated.