英语选词填空:It is the first question parents ask when theirchild

英语选词填空:It is the first question parents ask when theirchild is……

It's the first question parents ask when their child is diagnosed with autism (自闭症). Will his future brothers or sisters have a higher risk of __47__ it, too?
According to the largest study of siblings (兄弟姐妹) in families with autism, the answer is yes. Among 664 children who had at least one older sibling with the developmental disorder, the __48__ risk of autism was nearly 19%, __49__ higher than previous sibling-recurrence estimates that were anywhere from 3% to 10%. Kids with more than one older autistic sibling had an even higher risk of the disorder: 32%.
The __50__ suggest that genes play a key role in autism risk. But they also hint that other environmental factors __51__ by siblings, like influences in the womb (子宫), may be important as well.
On the __52__ of the findings, the researchers recommend that doctors closely __53__ younger siblings of autistic children to pick up any early signs of the disorder, __54__ an unusually large head or delayed language development and communication skills. Evidence suggests that early __55__ and diagnosis of autism can help children take advantage of therapies that can treat some of its __56__.
47 F 48 A 49 H 50 L 51 M
52 B 53 J 54 I 55 E 56 O
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