1.M ethods to divide our hospital's lunger of recent years who have difficul t and p ositive phlegm smear phthisic into two groups(check group and cure group) and pr ocess random analysis.

1.对院近年来难性肺结核、痰涂片阳性病人随分为两组(对照组和疗组)。对照组化疗方案,疗组加用卷曲霉素,观察疗效。