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　　美国总统拜登总统承诺帮助那些在omicron变体中苦苦挣扎的州长，但承认各州需要带头控制大流行。　　这些评论代表了拜登政府迄今为止最明确的承认之一，即在遏制 Covid-19 传播的努力中需要州和地方政府的帮助。　　拜登可能担心，如果没有各州的帮助，联邦遏制病毒的举措将无法奏效。航空公司采取了各种措施来防止机组人员感染，例如联合航空要求全员接种疫苗，达美航空对未接种疫苗的员工每月收取一笔附加费。

Tesla stock jumps more than 7% and retakes $1 trillion market capitalization, $1,000 share price after CEO tells satirical website that he has completed his stock sales.Tesla Inc. is once again worth $1 trillion, after Chief Executive Elon Musk said he is done selling shares.Tesla shares roared 7.5% higher to $1,008.87 Wednesday, pushing share prices higher than $1,000 and the electric-car company's market capitalization -- the value of all shares -- past $1 trillion. After first topping that pl

* Tesla jumps as CEO Musk says he has sold 'enough' stock. * Pfizer rises as oral COVID-19 pill wins approval. Dec 22 - Wall Street's main indexes powered higher on Wednesday in a broad rally after upbeat economic data and hopeful developments about the severity of the Omicron coronavirus variant that is sweeping the world.The S&P 500 gained at least 1% for a second straight session, putting it near record levels, as volatility has ratcheted up in the last month of 2021 following the arrival of