全文获取类型
收费全文 | 2343篇 |
免费 | 210篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 38篇 |
儿科学 | 132篇 |
妇产科学 | 27篇 |
基础医学 | 226篇 |
口腔科学 | 67篇 |
临床医学 | 303篇 |
内科学 | 578篇 |
皮肤病学 | 16篇 |
神经病学 | 200篇 |
特种医学 | 187篇 |
外国民族医学 | 1篇 |
外科学 | 388篇 |
综合类 | 58篇 |
一般理论 | 1篇 |
预防医学 | 138篇 |
眼科学 | 14篇 |
药学 | 93篇 |
中国医学 | 12篇 |
肿瘤学 | 85篇 |
出版年
2021年 | 17篇 |
2020年 | 19篇 |
2019年 | 14篇 |
2018年 | 41篇 |
2017年 | 51篇 |
2016年 | 49篇 |
2015年 | 44篇 |
2014年 | 53篇 |
2013年 | 89篇 |
2012年 | 79篇 |
2011年 | 83篇 |
2010年 | 98篇 |
2009年 | 79篇 |
2008年 | 72篇 |
2007年 | 81篇 |
2006年 | 90篇 |
2005年 | 78篇 |
2004年 | 54篇 |
2003年 | 68篇 |
2002年 | 60篇 |
2001年 | 74篇 |
2000年 | 68篇 |
1999年 | 64篇 |
1998年 | 74篇 |
1997年 | 63篇 |
1996年 | 67篇 |
1995年 | 63篇 |
1994年 | 36篇 |
1993年 | 46篇 |
1992年 | 57篇 |
1991年 | 41篇 |
1990年 | 59篇 |
1989年 | 52篇 |
1988年 | 50篇 |
1987年 | 56篇 |
1986年 | 44篇 |
1985年 | 49篇 |
1984年 | 33篇 |
1983年 | 45篇 |
1982年 | 18篇 |
1981年 | 29篇 |
1980年 | 19篇 |
1979年 | 34篇 |
1978年 | 20篇 |
1977年 | 29篇 |
1976年 | 29篇 |
1974年 | 14篇 |
1973年 | 17篇 |
1971年 | 12篇 |
1969年 | 10篇 |
排序方式: 共有2564条查询结果,搜索用时 15 毫秒
1.
Hernia of the inferior lumbar space. A cause of back pain 总被引:1,自引:0,他引:1
H G Light 《Archives of surgery (Chicago, Ill. : 1960)》1983,118(9):1077-1080
Twenty hernias of incarcerated fat at the inferior lumbar space were seen during a 23-year period. The usual complaint was a painful mass that caused a backache. The condition was more common in women and girls than in men (18 v two). The wider female pelvis creates a larger inferior lumbar space, which predisposes to the hernia. The hernia appears through a defect of the covering lumbodorsal fascia. Increased physical activity in young women seemed to be a causative factor. One patient had acute strangulation of incarcerated fat. Nineteen of the 20 hernias were treated with surgical excision and repair of the lumbodorsal fascial defect. Results of treatment were good. Though rare, hernias of the inferior lumbar space should be considered when back pain is present, particularly in a young, athletic woman. 相似文献
2.
3.
Diseases like rotavirus afflict both upper- and lower-income countries, but most serious illnesses and deaths occur among the latter. It is a vital public health issue that vaccines for these types of global diseases can recover research and development (R&D) costs from high-priced markets quickly so that manufacturers can offer affordable prices to lower-income nations. Cost recovery depends on how high R&D costs are, and this study attempts to replace high, unverified estimates with lower, more verifiable estimates for two new vaccines, RotaTeq (Merck) and Rotarix (GlaxoSmithKline or GSK), based on detailed searches of public information and follow-up interviews with senior informants. We also offer a new perspective on “cost of capital” as a claim for recovery from public bodies. Our estimates suggest that companies can recover all fixed costs quickly from affluent markets and thus can offer these vaccines to lower-income countries at prices they can afford. Better vaccines are a shared project between companies and public health agencies; greater transparency and consistency in reporting of R&D costs is needed so that fair prices can be established. 相似文献
4.
5.
Benign intracranial hypertension and recombinant growth hormone therapy in Australia and New Zealand
PA Crock JD McKenzie AM Nicoll NJ Howard W Cutfield LK Shield G Byrne 《Acta paediatrica (Oslo, Norway : 1992)》1998,87(4):381-386
Benign intracranial hypertension (BIH) is reported in three children from Australia and one from New Zealand, who were being treated with recombinant human growth hormone (rhGH). Three males and one female, aged between 10.5 and 14.2 y, developed intracranial hypertension within 2 weeks to 3 months of starting treatment. A national database, OZGROW, has been prospectively collecting data on all 3332 children treated with rhGH in Australia and New Zealand from January 1986 to 1996. The incidence of BIH in children treated with growth hormone (GH) is small, 1.2 per 1000 cases overall, but appears to be greater with biochemical GHD (<10IUml -1 ), i.e. 6.5/1000 (3 in 465 cases), relative risk 18.4, 95% confidence interval 1.9-176.1, than in all other children on the database. The incidence in patients with Turner's syndrome was 2.3/1000 (1 in 428 cases). No cases in patients with partial GHD (10–20 IUml -1 ) or chronic renal failure were identified. Possible causative mechanisms are discussed. The authors'practice is now to start GH replacement at less than the usual recommended dose of 14IUm-2 week-1 in those children considered to be at high risk of developing BIH. Ophthalmological evaluation is recommended for children before and during the first few months following commencement of rhGH therapy and is mandatory in the event of peripheral or facial oedema, persistent headaches, vomiting or visual symptoms. The absence of papilledema does not exclude the diagnosis. 相似文献
6.
Edwin H. Preston Jimmy A. Light Robert L. Kampen Allan D. Kirk 《American journal of transplantation》2004,4(2):283-285
Passenger leukocytes have been suggested to be both pro-tolerant and immunogenic. The opportunity to evaluate the role of allogeneic passenger leukocytes in humans was presented by a 47-year-old man who donated bone marrow to his HLA-identical leukemic sister. Eleven years later he developed renal failure. The sister's marrow was noted to be 100% XY karyotype and free of malignancy. She donated a kidney to her brother. Immunosuppression was tapered following transplantation. After 6 months, the recipient was on monotherapy sirolimus, 1 mg every third day. A surveillance biopsy was normal and sirolimus was stopped. Eight weeks later, he presented with severe rejection that reversed with Thymoglobulin. Renal function returned to baseline and has been stable on conventional immunosuppression. 相似文献
7.
In a prospective, randomized, double-blind study, 49 patients underwent lumbar myelography using iotrol (24 patients) or metrizamide (25 patients). The diagnostic imaging adequacy of iotrol was comparable with that of metrizamide. After iotrol myelography, adverse reactions were fewer, less severe, and of shorter duration than were those following metrizamide myelography. Thirteen of 24 patients (54%) receiving iotrol reported some adverse reactions compared with 24 of 25 patients (96%) receiving metrizamide. Five moderate and one severe adverse reaction occurred in the group receiving iotrol. Fourteen moderate and eight severe adverse reactions occurred in the group receiving metrizamide. Thirty-eight patients underwent electroencephalography both before and after myelography (19 iotrol and 19 metrizamide). None of the EEGs obtained after iotrol myelography changed from baseline, while seven of the EEGs obtained after metrizamide myelography showed changes from baseline. Iotrol was judged superior to metrizamide as a contrast medium in this patient population. 相似文献
8.
9.
10.
臂丛神经根性损伤膈神经移位术对青壮年患者早期呼吸功能的影响 总被引:1,自引:1,他引:0
目的研究臂丛神经损伤膈神经移位术对青壮年患者早期呼吸功能的影响.方法对16例接受膈神经移位治疗的患者,在术前、术后(10 d)进行肺功能指标的比较,同时定期进行门诊随访,观察呼吸系统自觉症状程度.结果13例术后出现了不同程度的供氧不足症状,16例全部出现一侧膈肌抬高,术后第10天肺活量(VC)、肺活量预计值百分数(VC%)分别比术前减少37.98%和26.88%,两者差异有统计学意义(tvc=11.532、tvc%=0,P<0.01).其它项目如残气量(RV)较术前轻度下降,肺总量(TLC)下降值达到术前肺总量的36.49%,残气量/肺总量比值(RV/TLC%)较术前上升了4.75%,上述各指标的差值均有统计学意义.1 s用力呼气量/用力肺活量比值(FEV1/FVC)和术前比基本无改变,但其差值有统计学意义.膈神经移位右侧(10例)与左侧(6例)术前、术后肺活量比较差异有统计学意义.术后随访8个月~2年,所有患者均无明显呼吸困难和胸闷等症状.结论膈神经移位术后对青壮年患者肺容量有较大的丧失,肺通气功能减弱和小气道阻力增加,但其丧失程度在机体自身代偿耐受范围内,不会导致急剧发生的严重呼吸功能障碍.建议对右侧臂丛神经根性损伤的患者,术前进行严格的肺、心功能检查,避免发生较为严重的并发症. 相似文献