It is 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 (11) ________ 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 (12) ________ risk of autism was nearly 19%, (13) ________ higher than previous sibling-recurrence(复发) 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 (14) ________ suggest that genes play a key role in autism risk. But they also hint that other environmental factors (15) ________ by siblings, like influences in the womb(子宫)， may be important as well.
On the (16) ________ of the findings, the researchers recommend that doctors closely (17) ________ younger siblings of autistic children to pick up any early signs of the disorder, (18) ________ unusually large head or delayed language development and communication skills. Evidence suggests that early (19) ________ and diagnosis of autism can help children take advantage of therapies that can treat some of its (20) ________ .
A) average
B) basis
C) common
D) consequently
E) detection
F) developing
G) distributed
H) dramatically
I) including
J) monitor
K) reason
L) results
M) shared
N) symbols
O) symptoms