11.   Searches that passed muster include sobriety checkpoints and border roadblocks to catch illegal immigrants.

n. + checkpoint >>共 84
security 23.28%
police 21.07%
army 18.95%
border 10.54%
airport 3.31%
road 1.87%
immigration 1.87%
rebel 1.53%
government 1.53%
custom 1.27%
sobriety 0.93%
sobriety + n. >>共 11
test 77.57%
checkpoint 10.28%
program 2.80%
center 1.87%
stop 1.87%
bill 0.93%
doctor 0.93%
examination 0.93%
point 0.93%
police 0.93%
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