全文获取类型
收费全文 | 36873篇 |
免费 | 1996篇 |
国内免费 | 110篇 |
专业分类
耳鼻咽喉 | 444篇 |
儿科学 | 2197篇 |
妇产科学 | 745篇 |
基础医学 | 4700篇 |
口腔科学 | 862篇 |
临床医学 | 2603篇 |
内科学 | 7458篇 |
皮肤病学 | 857篇 |
神经病学 | 1951篇 |
特种医学 | 820篇 |
外科学 | 5057篇 |
综合类 | 1343篇 |
一般理论 | 16篇 |
预防医学 | 2159篇 |
眼科学 | 1618篇 |
药学 | 3598篇 |
中国医学 | 277篇 |
肿瘤学 | 2274篇 |
出版年
2023年 | 247篇 |
2022年 | 704篇 |
2021年 | 1228篇 |
2020年 | 656篇 |
2019年 | 904篇 |
2018年 | 1095篇 |
2017年 | 756篇 |
2016年 | 1000篇 |
2015年 | 1024篇 |
2014年 | 1420篇 |
2013年 | 1805篇 |
2012年 | 2490篇 |
2011年 | 2509篇 |
2010年 | 1437篇 |
2009年 | 1282篇 |
2008年 | 1835篇 |
2007年 | 1795篇 |
2006年 | 1789篇 |
2005年 | 1425篇 |
2004年 | 1429篇 |
2003年 | 1204篇 |
2002年 | 1017篇 |
2001年 | 824篇 |
2000年 | 869篇 |
1999年 | 730篇 |
1998年 | 312篇 |
1997年 | 214篇 |
1996年 | 223篇 |
1995年 | 219篇 |
1994年 | 176篇 |
1993年 | 150篇 |
1992年 | 498篇 |
1991年 | 404篇 |
1990年 | 430篇 |
1989年 | 395篇 |
1988年 | 357篇 |
1987年 | 356篇 |
1986年 | 348篇 |
1985年 | 323篇 |
1984年 | 262篇 |
1983年 | 219篇 |
1979年 | 230篇 |
1978年 | 148篇 |
1977年 | 180篇 |
1976年 | 139篇 |
1975年 | 171篇 |
1974年 | 183篇 |
1973年 | 182篇 |
1972年 | 173篇 |
1971年 | 161篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Serum LH, FSH and testosterone were quantitated in 9 patients with pure motor stroke within 24-48 h of its reported onset. High circulating LH with normal or low testosterone was noted in 8 of them. In response to an intravenous bolus of GnRH, the LH responses were exaggerated in all, but the FSH responses in 7 of them were comparable to those in eugonadal age matched controls. The rise in testosterone following 2000U hCG daily for 3 consecutive days was insignificant in the patients group compared to the controls. The data suggest normally operative pituitary testicular feed-back but decreased Leydig cell response in pure motor stroke. 相似文献
12.
13.
A. K. Singh M. Gujar S. Shiral R. M. Raizada 《Indian journal of otolaryngology and head and neck surgery》2004,56(4):297-298
A case of rhinolith in a 60 years old male prsenting with palatal performation is, presented alongwith a brief discussion
on the pathogenesis and treatment. 相似文献
14.
15.
16.
Y K Murali P Anand V Tandon R Singh R Chandra P S Murthy 《Experimental and clinical endocrinology & diabetes》2007,115(10):641-646
The aqueous extract of the fruits of Terminalia chebula Retz. has been evaluated for its antidiabetic activity in streptozotocin (STZ) induced mild diabetic rats and compared with a known drug, tolbutamide. The oral effective dose (ED) of the extract was observed to be 200 mg/kg body weight, which produced a fall of 55.6% (p<0.01) in the oral glucose tolerance test. Oral administration of ED of aqueous extract of T.chebula (AETC) daily once for two months reduced the elevated blood glucose by 43.2% (p<0.01) and significantly reduced the increase in glycosylated hemoglobin (HbA1c) (p<0.01). The same dose also showed a marked improvement in controlling the elevated blood lipids as well as decreased serum insulin levels in contrast to the untreated diabetic animals. Hepatic and skeletal muscle glycogen content decreased by 75% and 62.9% respectively in diabetic controls, these alterations were partly prevented (34.9% and 21.17%) in AETC treated group when compared to the healthy controls. The in vitro studies with pancreatic islets showed that the insulin release was nearly two times more than that in untreated diabetic animals. The treatment did not have any unfavorable effect on other blood parameters of liver and kidney function tests. LD 50 was found to be above 3 g/kg bw i.e. 15 times of ED, because there were no deaths of animals even at this dose indicating high margin of safety. These findings suggest further investigations for the possible use of the aqueous extract of fruits of T.chebula for the treatment of diabetes. 相似文献
17.
Rajwinder Singh Jutley Mohammed Wesam Khalil Gaetano Rocco 《European journal of cardio-thoracic surgery》2005,28(1):43-46
OBJECTIVE: VATS using the conventional three ports is currently the technique of choice for blebectomy/bullectomy for spontaneous pneumothorax. However, the procedure has recently been shown to have neurological complications related to the port sites. Uniportal VATS has recently been proposed as an alternative to conventional three-port VATS. It is anticipated that the single incision will predispose to a lower incidence of neurological complications. METHODS: We report our initial single surgeon experience of uniportal VATS (n = 16) and provide a comparison of post-operative pain and residual paraesthesia to conventional three-port procedures (n = 19) for the same pathology. RESULTS: In both groups, the pneumothorax pathology was principally primary. There was no difference between the groups in terms of age, spirometry, tissue resected, drainage time and inpatient stay. A difference was, however, noted in inpatient pain scores. The uniportal group had a lower median score of 0.4 (visual analogue range 0-4) while the three-port technique reported 0.8 (P = 0.06, Mann-Whitney test). The maximum score trend was similar (1.4 vs. 2.6, respectively, P < 0.001, Mann-Whitney test). Follow-up for uniportal and three-port VATS averaged 9.4+/-6.6 and 32.1+/-9.9 months, respectively. One patient in the three-port group had a pneumothorax recurrence. Three-port VATS also had a higher residual pain score (0.5) compared to uniportal VATS (0.3). Of clinical significance was the incidence of neurological complications. Eighty-six percent of uniportal patients reported no symptoms. The remaining experienced only mild 'numbness' or 'swelling'. However, in the three-port group, only 42% reported no symptoms. A similar number experienced 'numbness'. Two females described sexual dysfunction due to altered breast sensitivity. Seventeen percent (2/12) reported 'pins and needles'. CONCLUSIONS: Uniportal VATS appears to be tolerable, safe and efficient in treating spontaneous pneumothorax in our series. Moreover, post-operative pain and paraesthesia incidence was lower than three-port VATS. Prospective randomised trials are important to evaluate this technique. 相似文献
18.
19.
Pratipal Singh Vivek Vijjan Manu Gupta Deepak Dubey Aneesh Srivastava 《International journal of urology》2007,14(6):558-560
Congenital thoracic ectopic kidney is a very rare developmental anomaly and the rarest form of all ectopic kidneys. It is usually asymptomatic and discovered incidentally on routine chest radiography. Herein we reported the first case of staghorn stone in a thoracic kidney managed successfully by percutaneous nephrolithotomy. 相似文献
20.
Akshay Pratap Devendra Kumar Gupta Chandra Shekhar Agrawal Rakesh Kumar Pandit Shailesh Adhikary Anand Kumar Awadhesh Tiwari Satyendra Narayan Singh 《International journal of urology》2007,14(3):198-202
OBJECTIVES: We analyzed the methods and outcomes of urethroplasty in men with complex urethral disruptions. METHODS: The medical records of 40 men with complex urethral disruptions were analyzed. Surgical methods were individualized according to stricture location, severity and length of the stricture, bladder neck characteristics and presence of complicating factors. Patients were divided into four groups based on the above characteristics. RESULTS: End-to-end urethroplasty performed in six patients with short bulbar strictures (<3 cm) was successful in all. Elaborated perineal repair was performed in 10 patients with intermediate (3-6 cm) strictures with or without complicating factors. Elaborated perineal repair with urethral substitution was performed in nine patients with long segment stricture (>6 cm). Abdominal transpubic repair was successfully applied to patients with rectourethral fistula or lacerated bladder neck. Success rate of anastomotic urethroplasty was 95% while over all success rate was 85%. CONCLUSION: Guidelines for urethral reconstruction of complex urethral disruptions are predicated on stricture length, location, bladder neck characteristics and associated complicating factors. End-to-end urethroplasty with stricture excision is highly reliable for short strictures for which previous operative repair have failed. Elaborated perineal repair is extremely versatile for intermediate and longer strictures with associated complicating factors. Abdominal transpubic urethroplasty is effective for patients with rectourethral fistula or lacerated bladder neck. 相似文献