Host Dominican Republic, pressured by the White House, had barred Cuba, Nicaragua and Venezuela from attending the regional gathering. But after leftist leaders in Colombia and Mexico threatened to pull out in protest — and with no commitment from Trump to attend — the Dominican Republic’s president, Luis Abinader, decided at the last minute to postpone the event, citing “deep differences” in the region.
GPT-5.4 Thinking 在 ChatGPT 中新增了一项「中途打断」功能：在处理复杂任务之前，模型会先呈现工作计划概要，再开始执行。用户可以在执行过程中随时介入调整方向，不必等到结果出来再从头重来。。关于这个话题，PDF资料提供了深入分析
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Launch had been planned for early February, but it was delayed to repair a hydrogen leak and, more recently, to give engineers time to fix a helium pressurization problem in the rocket's upper stage. Launch is now on hold until at least April 1.。PDF资料是该领域的重要参考