请解释这个文件

http://www.state.gov/documents/organization/87531.pdf
第八-九页, nonimmigrant visa for adopted child.

这里面只有两种情况被收养的小孩可以有把握地拿到非移民签证
（1）被居住在国外的美国公民收养，计划访问美国但是没有在美国永久居住的打算
（2）被在美国的非移民父母收养（比如F，J等）可以作为父母签证的家属（F-2, J-2）etc.
最后
（3）被居住在美国的美国公民收养的小孩，如果签证官相信小孩访问后会离境，可以发B-2；但是：
However, for cases where you are not satisfied that the child will return to their place of residence, a NIV should not be issued to the child. Such an issuance would violate the law, circumvent scrutiny intended to protect the child and adoptive parents, and place the child in an untenable immigration predicament since DHS regulations generally prohibit the approval of an immigrant petition for a child who is in the United States either illegally or in nonimmigrant status.

虽然这个规定没有说绿卡持有者收养的小孩，但是政策原因应该和以上类似，我并不看好楼主能够成功地拿到B-2.