应对疫情等因素影响，要求“发挥好防止返贫监测帮扶机制预警响应作用”；
For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.
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Most cases in children are mild, although they will feel unwell and will need to miss school or nursery for several days.
Then Fayers' team will have to ask the environmental regulators for final approval.