Think about how you'd search a large room for a lost key. You wouldn't examine every square inch sequentially. You'd split the room into sections (by the couch, near the door, under the table) and rule out entire sections at a glance. "I didn't go near the kitchen, so skip that."
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He’s still working at Google.。业内人士推荐WPS官方版本下载作为进阶阅读
With those two tips, county health officials opened an investigation and were able to identify 13 cases—seven laboratory-confirmed cases of S. enterica Agbeni and six probable cases that were in close contact with confirmed cases. The cases spanned five counties, but they all had one thing in common: everyone had gone to the Brown County fair.