ASP精确查询不能查询到记录

<%
set con=server.createobject("adodb.connection")
con.connectionstring="driver={microsoft access driver (*.mdb)};" & "dbq=" & server.mappath("xsb.mdb")
con.open
set rs=server.createobject("adodb.recordset")

x=admin
sql="select * from xyl where xh ='" & x & "'"
rs.open sql,con,1,3
response.write rs.recordcount
%>

请问查询的语句应该怎么写才会好?
x是变量.
x=admin
sql="select * from xyl where xh ='" & x &"'"
rs.open sql,con,1,3
response.write rs.recordcount
response.write x
这样.最后的结果是0

x="admin"
sql="select * from xyl where xh ='" & x &"'"
rs.open sql,con,1,3
response.write rs.recordcount
response.write x
这样最后的结果是
1 admin

因为x是我表单的变量.所以有什么方法可以使x="admin" 这样的形式?

x=request.form("xh")