全文获取类型
收费全文 | 1151篇 |
免费 | 49篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 55篇 |
妇产科学 | 71篇 |
基础医学 | 104篇 |
口腔科学 | 63篇 |
临床医学 | 139篇 |
内科学 | 297篇 |
皮肤病学 | 15篇 |
神经病学 | 53篇 |
特种医学 | 72篇 |
外科学 | 172篇 |
综合类 | 20篇 |
预防医学 | 45篇 |
眼科学 | 7篇 |
药学 | 37篇 |
中国医学 | 2篇 |
肿瘤学 | 19篇 |
出版年
2024年 | 1篇 |
2023年 | 6篇 |
2022年 | 21篇 |
2021年 | 34篇 |
2020年 | 18篇 |
2019年 | 24篇 |
2018年 | 31篇 |
2017年 | 25篇 |
2016年 | 31篇 |
2015年 | 49篇 |
2014年 | 67篇 |
2013年 | 67篇 |
2012年 | 90篇 |
2011年 | 94篇 |
2010年 | 53篇 |
2009年 | 48篇 |
2008年 | 83篇 |
2007年 | 87篇 |
2006年 | 75篇 |
2005年 | 80篇 |
2004年 | 75篇 |
2003年 | 30篇 |
2002年 | 34篇 |
2001年 | 16篇 |
2000年 | 28篇 |
1999年 | 13篇 |
1998年 | 6篇 |
1997年 | 1篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有1204条查询结果,搜索用时 31 毫秒
71.
72.
86 cases of genital tuberculosis were evaluated retrospectively by clinical, anatomical, laparoscopic and HSG findings. The authors observed in 24 cases out of 86 (27.9%) unilateral simple ovarian cyst. They conclude that genital tuberculosis must be suspected and investigated when simple ovarian cyst has been found in infertile women. 相似文献
73.
Bayram F Müderris II Güven M Keleştimur F 《European journal of endocrinology / European Federation of Endocrine Societies》2002,147(4):467-471
OBJECTIVE: To compare the clinical efficacy and safety of high-dose (5 mg/day) and low-dose (2.5 mg/day) finasteride in the treatment of hirsutism in women. DESIGN: A prospective, randomized and controlled clinical trial. METHODS: Fifty-six hirsute women with moderate to severe hirsutism were prospectively evaluated to see the effects of low-dose (2.5 mg/day) and high-dose (5 mg/day) finasteride. Patients were randomly divided into two treatment groups. Group I (n=29) received 2.5 mg finasteride/day and group II (n=27) received 5 mg finasteride/day orally for 1 year. Hirsutism score, body mass index and hormonal parameters (FSH, LH, estradiol, androstenedione, testosterone, free testosterone, 17alpha-hydroxyprogesterone, dehydroepiandrosterone sulfate and sex hormone-binding globulin) were measured in all the patients before treatment and repeated at six-monthly intervals. RESULTS: The hirsutism scores decreased significantly at months 6 and 12 from a mean+/-s.d. of 18.4+/-4.6 to 13.3+/-5.2 (P<0.001) and 18.4+/-4.6 to 8.6+/-4.2 (P<0.001) in group I and from 18.7+/-5.2 to 13.9+/-5.3 (P<0.001) and 18.7+/-5.2 to 10.3+/-5.0 (P<0.001) in group II respectively. No significant changes in the blood chemistry and hormonal parameters except estradiol levels were observed. No serious side-effects were seen in the two groups. In group II, estradiol levels increased significantly at 6 and 12 months. CONCLUSIONS: In this study, hirsutism scores decreased significantly at 6 and 12 months in both groups I and II. Low-dose (2.5 mg/day) finasteride is safe and cost effective in the treatment of hirsutism and may be used instead of high-dose finasteride (5 mg/day) therapy. 相似文献
74.
Free tissue transfers have been rapidly replacing distant flaps for use in nasal reconstruction. The temporoparietal fascial flap is a thin, broad, pliable, and well-vascularized flap. It can be used to drape over the cartilaginous and bony framework of the nasal skeleton and nourish the underlying primary cartilage grafts as well as the overlying full-thickness skin graft. The thin contour of the flap is aesthetically superior to thicker skin flaps and eliminates the need for secondary defatting or touch-up procedures. A large, single sheet of full-thickness skin graft, harvested from the supraclavicular region, can be applied over the fascial flap in the same session and provide a quite acceptable color match. The authors present a case whose alar margins and atrophic nasal skin were restored in one session by primary conchal cartilage grafts, a free temporoparietal fascial flap, and a full-thickness supraclavicular skin graft. 相似文献
75.
Erdöl C Celik S Baykan M Gökçe M Karahan B Bayram A 《The Journal of cardiovascular surgery》2001,42(1):65-67
Coronary artery aneurysm (CAA) is a relatively rare disease that may cause angina, myocardial infarction, sudden death due to thrombosis, embolisation, or rupture. This report describes the case of a man aged 65 years old who had an anterior myocardial infarction due to left anterior descending artery (LAD) aneurysm. We attempted early percutaneous transluminal coronary angioplasty (PTCA) for treatment of acute myocardial infarction, but were not successful. He was then treated with intracoronary streptokinase. Serial coronary angiographies showed recanalisation and aneurysm on the LAD. The patient was operated on with coronary bypass surgery, and treated with an oral anticoagulant, nitrate, and blocker. He was well after one year of follow-up. 相似文献
76.
AIMS AND BACKGROUND: Breast cancer refractory to known effective agents is one of the major clinical problems frequently encountered in practice. Cisplatin and vinorelbine are known to be active drugs in anthracycline-refractory cases. In this phase II study, the effectiveness and tolerability of cisplatin and vinorelbine was investigated when used in combination as a salvage regimen in the treatment of metastatic refractory breast cancer. STUDY DESIGN: Twenty-four patients with advanced refractory breast cancer who had been previously treated with a regimen containing doxorubicin were included in the study. Six of the 24 patients also received taxanes after failure of doxorubicin. Cisplatin at 80 mg/m2 on day 1 and vinorelbine at 25 mg/m2 on days 1 and 8 were given every 3 weeks. RESULTS: A total of 98 cycles of chemotherapy was given, with a median of 4/patient. The response rate was 25% (2 [8.3%] complete and 4 [16.7%] partial responses). The median survival rates were 14 months in responders and 5.5 months in nonresponders (P = 0.0282). One complete and one partial response were observed in patients previously treated with paclitaxel (overall response rate, 33%). The median response duration was 12.5 mo (range, 4-21) in complete and 4.5 mo (range, 1.5-13) in the partial response group. Grade 3 and 4 neutropenia occurred in 9 patients, with no toxic deaths. Grade 2-3 nausea and vomiting in 6 patients and grade 1 neuropathy in 1 patient were noted. CONCLUSIONS: Although the number of cases is insufficient to indicate that the combination will be effective, it is noteworthy in consideration of anthracycline and taxane refractory cases. A combination of cisplatin and vinorelbine seems to be a reasonable and acceptable choice as an alternative salvage regimen in such cases. 相似文献
77.
We retrospectively evaluated the results of 61 patients (67 hips) who underwent total hip arthroplasty using the thrust plate prosthesis (TPP) for osteoarthritis of the hip joint. All patients were followed-up at least two years (mean: 37.2 months). Mean preoperative Harris hip score improved from 45.8 (SD: 13.5) to 94.9 (SD: 5.4) points postoperatively. Revision was performed in five cases. Medium-term results of TPP are promising. 相似文献
78.
Turker G Goren S Bayram S Sahin S Korfali G 《Journal of cardiothoracic and vascular anesthesia》2005,19(4):468-474
OBJECTIVE: The purpose of this study was to compare lumbar epidural morphine and lumbar epidural tramadol with respect to onset and duration of analgesia, analgesic efficacy, and drug-related side effects after muscle-sparing thoracotomy. DESIGN: Prospective, randomized, double-blind, clinical study. SETTING: Single university hospital. PARTICIPANTS: Forty patients who underwent elective muscle-sparing thoracotomy. INTERVENTIONS: Before anesthesia induction, an epidural catheter was placed in the L2-3 or L3-4 interspace using the loss-of-resistance technique. On arrival at the intensive care unit, patients were randomized to receive doses of either 100 mg of tramadol (group T) or 4 mg of morphine (group M) via the lumbar epidural catheter. Each dose was diluted in 10 mL of normal saline. On awakening from anesthesia, if the patient's pain score on a 0- to 100-mm visual analog scale was above 40 mm, the initial epidural drug dose was administered. The initial injection in each case was taken as time 0. Subsequent pain scores above 40 mm were considered indications for epidural dosing; each patient was allowed 2 doses in the first 12 hours postoperatively and 2 more in the second 12 hours. MEASUREMENTS AND MAIN RESULTS: The groups' analgesia onset times were similar, but duration of analgesia was significantly shorter in group T than in group M (p < 0.01). There were no differences between the groups with respect to pain scores at rest or during coughing at any of the time points investigated. Sedation scores were lower in group T than in group M at 1, 2, 3, 4, and 8 hours (p value range, 0.0001-0.05). Compared with group T, group M showed significantly greater drops in arterial oxygen tension from baseline at 3, 4, 8, and 12 hours (p value range, 0.0001-0.05). The group means for arterial carbon dioxide tension and respiratory rate were similar at all time points investigated. CONCLUSION: The study revealed that the quality of analgesia achieved with repeated doses of lumbar epidural tramadol after muscle-sparing thoracotomy is comparable to that achieved with repeated doses of lumbar epidural morphine. Compared with morphine, lumbar epidural tramadol results in less sedation and a less-pronounced decrease in oxygenation. 相似文献
79.
OBJECTIVE: To explore the prevalence, type, frequency and causes of domestic marital violence among Turkish women in a socio-economically developed metropolitan setting. METHODS: A cross-sectional study was performed in 2003. All married women, aged 18 years and over, who were visiting any of the 50 primary health care units for different purposes were asked to participate in the study. Of 1427 asked, 1010 gave consent and completed face-to-face interviews. Multiple correspondence analysis, and logistic regression were used for statistical analyses. RESULTS: Domestic violence was statistically significantly associated with educational level. Illiterate women reported marital abuse 2.6 times more than university or more educated women. No statistically significant relationship was observed between domestic marital violence and women's age or occupation, marital duration or family income. The most frequently reported type of violence was physical, followed by psychological. Among women reporting domestic violence, those with the lowest educational level and income were experiencing all types of domestic violence frequently. CONCLUSION: Placing more importance on educating girls could be a key component of preventing domestic violence. 相似文献
80.
Sandal S Yilmaz B Godekmerdan A Kelestimur H Carpenter DO 《Immunopharmacology and immunotoxicology》2005,27(4):601-613
Polychlorinated biphenyls (PCBs) are industrial chemicals that have been released into the environment, resulting in widespread and persistent contamination. PCBs exist as 209 different congeners depending on the chlorine substitution on the biphenyl rings, and the physical properties and toxic effects of different PCB congeners are structure-dependent. We have tested an ortho-substituted, noncoplanar congener, 2,2',5,5'-tetrachlorobiphenyl (PCB 52), and a non-ortho-substituted coplanar congener, 3,3',4,4'-tetrachlorobiphenyl (PCB 77), for their effects on the T helper 1 (Th1) and T helper 2 (Th2) lymphocyte balance. The experiments were performed in 10 microg/ml concanavalin A (Con A)-stimulated and nonstimulated thymocytes for determination of cytokine production profiles. Interferon-gamma (produced by Th1 cells) and interleukin (IL)-10 (produced by Th2 cells) concentrations were measured in the supernatants at 12 and 24 hr after treatment with PCBs. PCBs 52 and 77 caused significant increases in interferon-gamma levels at 12 and 24 hr in both Con A-stimulated and nonstimulated media. IL-10 levels were significantly reduced at two interval periods by PCBs 52 and 77 in cultures with and without Con A. Our results show that the cytokine production profile was significantly shifted to Th1 by both ortho-substituted and coplanar PCB congeners in mouse thymocyte cultures. 相似文献