这些昆虫会释放出一种抗凝血剂去维持血液的流动，同时也会分泌一种使人失去知觉的物质，所以他们的叮咬并不会影响受害者的睡眠。
The insects release an anticoagulant to get blood flowing, and they also excrete a numbing agent so their bites don't often stir a victim's slumber.
结论静脉血栓形成可导致抗凝血酶活性下降，狼疮样抗凝物质增多是导致静脉血栓形成的因素之一。
Conclusions venous thrombosis can result in decreased antithrombin activity, and increased lupus_like anticoagulants is one of the factors that lead to venous thrombosis.
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