（一）在国家举行庆祝、纪念、缅怀、公祭等重要活动的场所及周边管控区域，故意从事与活动主题和氛围相违背的行为，不听劝阻，造成不良社会影响的；
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Transforms don't execute until the consumer pulls. There's no eager evaluation, no hidden buffering. Data flows on-demand from source, through transforms, to the consumer. If you stop iterating, processing stops.，更多细节参见91视频
// Flush: finalize compression