<s>
An	O
intelligent	B-Application
medical	I-Application
search	I-Application
engine	I-Application
is	O
a	O
vertical	B-Application
search	I-Application
engine	I-Application
that	O
uses	O
expert	B-Application
system	I-Application
technology	O
to	O
provide	O
personalized	O
medical	O
information	O
.	O
</s>
<s>
An	O
intelligent	B-Application
medical	I-Application
search	I-Application
engine	I-Application
is	O
specifically	O
designed	O
to	O
address	O
this	O
challenge	O
.	O
</s>
<s>
Second	O
,	O
it	O
uses	O
medical	O
knowledge	O
(	O
e.g.	O
,	O
diagnostic	O
decision	B-Algorithm
trees	I-Algorithm
)	O
to	O
automatically	O
form	O
multiple	O
queries	O
from	O
a	O
user	O
 '	O
answers	O
to	O
the	O
questions	O
.	O
</s>
