优化高级搜索;
新添分类查询;
<el-option label="主题" value="title"></el-option>
<el-option label="作者" value="author"></el-option>
<el-option label="文献来源" value="rouse"></el-option>
<el-option label="篇名" value="name"></el-option>
<el-option label="参考文献" value="look"></el-option>
<el-option label="内容" value="content"></el-option>
<el-option label="文章类型" value="wentype"></el-option>