#内行才知道#The reason we get tired throughout the day is because a neurochemical called adenosine builds up and passes through receptors, which causes nerve cells to become less active and blood vessels in your brain to dilate. In short, your body gets the message that it’s time to rest. But since caffeine resembles adenosine, it binds to these receptors instead—blocking the actual adenosine from passing through and preventing your body from slowing down.
Though caffeine can keep you awake for a while in this way, it doesn’t cause all that adenosine to vanish forever. “Just because our brain is no longer processing the adenosine doesn’t mean it stops producing it,” Michelle Worley, a registered nurse, told PureWow. “When the caffeine inevitably wears off, you’re left with an adenosine buildup which makes you feel even more tired.”
Lastly, you may have built up such a high tolerance for caffeine that a cup of joe just doesn’t perk you up like it used to.

美记：独行侠已经裁掉后卫内特-辛顿 预计会有多支球队对其感兴趣

据独行侠随队记者Tim Cato报道，消息人士透露，球队已经裁掉后卫内特-辛顿。

据记者JD Shaw跟进报道，预计会有多支球队对内特-辛顿感兴趣。

随着内特-辛顿被裁，卡利克-琼斯、费伦-亨特、EJ-奥努将会在训练营中争夺独行侠的最后一个双向合同名额。

上赛季辛顿替独行侠出战21场，场均得到2.0分0.4篮板。

【库克执掌苹果十年 获逾58亿花红】美国苹果公司当地时间周四公布一份美国证券交易委员会（SEC）文件，显示行政总裁苹果库克（Tim Cook）本周获得约7.5亿美元（约58.5亿港元）的花红。

库克收到五百万股苹果股份，那是他十年前接任此职位时议定薪酬方案的最后一笔。他已将这批股票的大部分卖出，获得款项约七亿五千万美元。

根据协议，库克已满足获得最大数量股份的资格，这取决于苹果股票相对于标普500指数其他公司的表现。他自2011年成为行政总裁以来，苹果的股价已飙升逾百分之一千二百。他去年再获得一份持续到2026年的新薪酬方案。

库克在2015年曾表示，计划去世前把所有财产都捐给慈善机构。