全文获取类型
收费全文 | 12161篇 |
免费 | 858篇 |
国内免费 | 102篇 |
专业分类
耳鼻咽喉 | 90篇 |
儿科学 | 366篇 |
妇产科学 | 271篇 |
基础医学 | 1328篇 |
口腔科学 | 182篇 |
临床医学 | 1103篇 |
内科学 | 2501篇 |
皮肤病学 | 177篇 |
神经病学 | 820篇 |
特种医学 | 490篇 |
外科学 | 1883篇 |
综合类 | 514篇 |
一般理论 | 7篇 |
预防医学 | 715篇 |
眼科学 | 978篇 |
药学 | 767篇 |
中国医学 | 70篇 |
肿瘤学 | 859篇 |
出版年
2023年 | 105篇 |
2022年 | 143篇 |
2021年 | 301篇 |
2020年 | 187篇 |
2019年 | 273篇 |
2018年 | 312篇 |
2017年 | 215篇 |
2016年 | 209篇 |
2015年 | 278篇 |
2014年 | 333篇 |
2013年 | 419篇 |
2012年 | 638篇 |
2011年 | 695篇 |
2010年 | 446篇 |
2009年 | 404篇 |
2008年 | 638篇 |
2007年 | 742篇 |
2006年 | 725篇 |
2005年 | 686篇 |
2004年 | 640篇 |
2003年 | 564篇 |
2002年 | 522篇 |
2001年 | 457篇 |
2000年 | 414篇 |
1999年 | 348篇 |
1998年 | 153篇 |
1997年 | 137篇 |
1996年 | 136篇 |
1995年 | 97篇 |
1994年 | 93篇 |
1993年 | 72篇 |
1992年 | 185篇 |
1991年 | 177篇 |
1990年 | 156篇 |
1989年 | 124篇 |
1988年 | 140篇 |
1987年 | 150篇 |
1986年 | 111篇 |
1985年 | 102篇 |
1984年 | 70篇 |
1983年 | 76篇 |
1982年 | 54篇 |
1981年 | 47篇 |
1980年 | 46篇 |
1979年 | 67篇 |
1978年 | 50篇 |
1977年 | 24篇 |
1976年 | 14篇 |
1973年 | 16篇 |
1972年 | 15篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
D T Leung R Y Tseng S H Go G L French C W Lam 《Archives of disease in childhood》1987,62(10):1075-1076
Of 74 paediatric inpatients with acute glomerulonephritis, 58 (78%) had a raised (greater than 1/200) antistreptolysin O titre. Serum C3 concentration was low in 73, but returned to normal within six weeks. Streptococcal infection remains the commonest cause of acute nephritis in children in Hong Kong, possibly due to overcrowded living conditions. 相似文献
63.
64.
Background : Many recent reports of the results of decompression of the median nerve in the carpal tunnel have concentrated on only one aspect of recovery (numbness, grip etc.), and there are no reports of a comprehensive study of outcome. The aim of the present study was to review comprehensively the results of the direct visualization method of decompression of the carpal tunnel and to compare them with the published results of endoscopic release. Methods : Patients' perceptions of the severity of pain, numbness and paraesthesiae due to carpal tunnel syndrome (CTS), before and after open carpal tunnel release (CTR) in 188 hands were reviewed retrospectively at a minimum time of follow-up of 18 months. Motor and sensory testing, provocation testing and measurement of scar tenderness in 135 hands were performed at a clinical review. Results : Subjective results showed that 70% experienced a reduction in the severity of pain after CTR, 78% of hands experienced a reduction in the severity of paraesthesiae and 77% experienced a reduction in the severity of numbness. A total of 49% had improvements in all three symptoms after CTR. At the clinical review, sensory testing revealed that 59% of hands had normal or slightly diminished light touch, 35% had normal static two-point discrimination and 61% had normal dynamic two-point discrimination. Results for Tinel's test, Phalen's test and pressure provocation testing were positive in 10% of hands. There was no scar tenderness in 38%, no persisting thenar atrophy in 90%. Normal grip strength was found in 93% and 91% had normal pinch strength. Conclusions : It was concluded that open carpal tunnel release remains a safe and reliable treatment for carpal tunnel syndrome. The very low incidence of serious complications from the open technique of CTR, when compared with endoscopic CTR as published by different authors in the literature, and the comparable clinical results, appears to make the open technique a safer and preferable option. However, a properly controlled trial of both techniques is necessary to compare them. 相似文献
65.
66.
67.
A M Rijke H T Goitz F C McCue J L Delp D Lam E Port Southall 《Investigative radiology》1991,26(11):926-933
Fifty-five patients with clinical suspicion of injury to their anterior cruciate ligament (ACL) were examined by graded stress radiography before arthroscopic verification in an effort to determine the loss of ACL function as a result of ligament tearing. Using a commercially available stress device capable of applying varying pressures to the mid-calf, anterior drawers were measured from lateral radiographs at 0-, 7-, 14-, and 21-kiloPascal pressures and used to calculate the equivalent elastic modulus of the remaining ACL fibers. According to viscoelastic theory, this modulus is proportional to the number of elastically active fibers in the ligament. To verify the validity of this concept, the stress-strain relationship of a freshly excised ACL ligament was examined in a tensile testing machine, and the procedure was repeated after the ligament had been partially transsected with a scalpel. Comparison with the elastic modulus of the (intact) ACL of the opposite knee permits an estimate of the percentage of rupture in cases of partial tears. Overstretched ligaments show essentially normal viscoelastic properties once the slack in the ligament has been taken up. Complete tears, on the other hand, show a complete breakdown in the viscoelastic properties of the ACL. The results show that partial tears can be diagnosed by graded stress radiography with a sensitivity of 20% and specificity of 90%. Diagnosis of overstretched ligaments had sensitivity of 50% and specificity of 94%. Complete tears were detected with sensitivity of 88% and specificity of 75% as diagnosed against all other ACL lesions and including normals.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
68.
J Lam R A Neirotti A Nijveld J L Schuller C M Blom-Muilwijk C A Visser 《Journal of the American Society of Echocardiography》1991,4(1):43-50
Transesophageal echocardiography was attempted in 59 pediatric patients with congenital heart disease in the operating room (n = 33) or during heart catheterization or in the intensive care unit (n = 26). Six different commercially available transducers were used with diameters ranging from 7 to 15 mm. Age ranged from 1 day to 16 years, and body weight ranged from 3.7 to 65 kg. Objectives of the study were to determine (1) minimum body weight in which transesophageal echocardiography with various probes is possible, (2) additional diagnostic value, and (3) potential applications. In three cases (one surgical and two nonsurgical) the probe could not be inserted. Minimum body weight was 17 to 20 kg for probes with a diameter of greater than or equal to 13 mm and approximately 12 kg for the 11 mm probes. A 7 mm probe, on the other hand, could be inserted easily in all patients (including a neonate) in whom transesophageal echocardiography was attempted. In 11 of 56 patients, additional diagnostic information was obtained. Thus, transesophageal echocardiography is feasible in the pediatric age group provided that special probes are used in small children. Additional diagnostic information can be obtained, and the technique is of value during cardiac surgery or balloon interventions for evaluation of the efficacy of the procedure and for monitoring ventricular function. 相似文献
69.
Paul K Y Lam W K Ho Manwa L Ng William I Wei 《Otolaryngology--head and neck surgery》2007,136(3):440-444
OBJECTIVE: To justify the application of medialization thyroplasty in Chinese patients with symptomatic cancer-related unilateral vocal fold paralysis (UVFP). STUDY DESIGN AND SETTING: Retrospective chart review from February 2000 to March 2006. RESULTS: Eighty-seven Chinese patients undergoing medialization thyroplasty for UVFP were included; there were no significant differences between the cancer-related and benign groups in terms of the speech and swallowing rehabilitation outcome and the perioperative complication rate (P > 0.05). The median survival time of cancer-related UVFP patients from the date of medialization to death was 129 days. Age more than 65 years was identified as the only factor for a shorter survival period after medialization (P = 0.040). CONCLUSION: Medialization thyroplasty restores satisfactory speech and swallowing and has a low perioperative complication rate in Chinese patients with cancer-related UVFP. Postmedialization survival period was also reasonable. SIGNIFICANCE: Medialization thyroplasty is a justifiable treatment option for cancer-related UVFP. 相似文献
70.