To
maintain
a
good
mood
causes:
promote
the
work
and
study
to
improve
the
quality
of
life
for
physical
and
mental
health.如何保持好心情：保持幽默
拥有健康的兴趣爱好
为人友好
多与人交流。How
to
keep
a
good
mood:
keep
a
sense
of
humor
has
a
healthy
hobby
for
many
people
friendly
communication
with
people.
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