fix asr result is empty and punc error

lzr265946

2023-01-18 ad873c50eed0d97dd3fe3c7f13a5dea9dc4c5369

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peme    p.m.
pe eme    p.m.
p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
ame    a.m.
a eme    a.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.