我想知道如何从某个文本文件中选择行数。例如：我有一个包含以下行的文本文件：
branch 27 : rect id 23400
rect: -115.475609 -115.474907
31.393650 31.411301
branch 28 : rect id 23398
rect: -115.474907 -115.472282
31.411301 31.417351
branch 29 : rect id 23396
rect: -115.472282 -115.468033
31.417351 31.427151
branch 30 : rect id 23394
rect: -115.468033 -115.458733
31.427151 31.438181
Non-Leaf Node: level=1 count=31 address=53
branch 0 : rect id 42
rect: -115.768539 -106.251556
31.425039 31.717550
branch 1 : rect id 50
rect: -109.559479 -106.009361
31.296721 31.775299
branch 2 : rect id 51
rect: -110.937401 -106.226143
31.285870 31.771971
branch 3 : rect id 54
rect: -109.584412 -106.069092
31.285240 31.775230
branch 4 : rect id 56
rect: -109.570961 -106.000954
31.296721 31.780769
branch 5 : rect id 58
rect: -115.806213 -106.366188
31.400450 31.687519
branch 6 : rect id 59
rect: -113.173859 -106.244057
31.297440 31.627750
branch 7 : rect id 60
rect: -115.811478 -106.278252
31.400450 31.679470
branch 8 : rect id 61
rect: -109.953888 -106.020111
31.325319 31.775270
branch 9 : rect id 64
rect: -113.070969 -106.015968
31.331841 31.704750
branch 10 : rect id 68
rect: -113.065689 -107.034576
31.326300 31.770809
branch 11 : rect id 71
rect: -112.333344 -106.059860
31.284081 31.662920
branch 12 : rect id 73
rect: -115.071083 -106.309677
31.267879 31.466850
branch 13 : rect id 74
rect: -116.094414 -106.286308
31.236290 31.424770
branch 14 : rect id 75
rect: -115.423264 -106.286308
31.229691 31.415510
branch 15 : rect id 76
rect: -116.111656 -106.313110
31.259390 31.478300
branch 16 : rect id 77
rect: -116.247467 -106.309677
31.240231 31.451799
branch 17 : rect id 78
rect: -116.170792 -106.094543
31.156429 31.391781
branch 18 : rect id 79
rect: -116.225723 -106.292709
31.239960 31.442850
branch 19 : rect id 80
rect: -116.268013 -105.769913
31.157240 31.378111
branch 20 : rect id 82
rect: -116.215424 -105.827202
31.198441 31.383421
branch 21 : rect id 83
rect: -116.095734 -105.826439
31.197460 31.373819
branch 22 : rect id 84
rect: -115.423264 -105.815018
31.182640 31.368891
branch 23 : rect id 85
rect: -116.221527 -105.776512
31.160931 31.389830
branch 24 : rect id 86
rect: -116.203369 -106.473831
31.168350 31.367611
branch 25 : rect id 87
rect: -115.727631 -106.501587
31.189100 31.395941
branch 26 : rect id 88
rect: -116.237289 -105.790756
31.164780 31.358959
branch 27 : rect id 89
rect: -115.791344 -105.990044
31.072620 31.349529
branch 28 : rect id 90
rect: -115.736847 -106.495079
31.187969 31.376900
branch 29 : rect id 91
rect: -115.721710 -106.000130
31.160351 31.354601
branch 30 : rect id 92
rect: -115.792236 -106.000793
31.166620 31.378811
Leaf Node: level=0 count=21 address=42
branch 0 : rect id 18312
rect: -106.412270 -106.401367
31.704750 31.717550
branch 1 : rect id 18288
rect: -106.278252 -106.253387
31.520321 31.548361
我只想要那些在非叶节点级别 = 1 到叶节点级别 = 0 之间的线，并且还有很多这样的段，我需要它们。