drop-oldest: Drops the oldest buffered data to make room. Useful for live feeds where stale data loses value.
（四）胁迫、欺骗医务人员开具麻醉药品、精神药品的。
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Tellingly, Trump did not come back with an offer of sweeteners to promote investment. Instead, he threatened to block ExxonMobil investment in Venezuela.
highWaterMark: 10,