全文获取类型
收费全文 | 3558篇 |
免费 | 230篇 |
国内免费 | 60篇 |
专业分类
耳鼻咽喉 | 80篇 |
儿科学 | 117篇 |
妇产科学 | 48篇 |
基础医学 | 447篇 |
口腔科学 | 31篇 |
临床医学 | 418篇 |
内科学 | 738篇 |
皮肤病学 | 115篇 |
神经病学 | 333篇 |
特种医学 | 399篇 |
外科学 | 307篇 |
综合类 | 133篇 |
一般理论 | 1篇 |
预防医学 | 324篇 |
眼科学 | 46篇 |
药学 | 165篇 |
中国医学 | 3篇 |
肿瘤学 | 143篇 |
出版年
2023年 | 20篇 |
2022年 | 31篇 |
2021年 | 68篇 |
2020年 | 44篇 |
2019年 | 51篇 |
2018年 | 75篇 |
2017年 | 41篇 |
2016年 | 49篇 |
2015年 | 55篇 |
2014年 | 83篇 |
2013年 | 148篇 |
2012年 | 135篇 |
2011年 | 135篇 |
2010年 | 127篇 |
2009年 | 128篇 |
2008年 | 143篇 |
2007年 | 154篇 |
2006年 | 130篇 |
2005年 | 122篇 |
2004年 | 109篇 |
2003年 | 113篇 |
2002年 | 108篇 |
2001年 | 97篇 |
2000年 | 79篇 |
1999年 | 78篇 |
1998年 | 95篇 |
1997年 | 108篇 |
1996年 | 118篇 |
1995年 | 80篇 |
1994年 | 76篇 |
1993年 | 66篇 |
1992年 | 65篇 |
1991年 | 49篇 |
1990年 | 73篇 |
1989年 | 72篇 |
1988年 | 66篇 |
1987年 | 76篇 |
1986年 | 82篇 |
1985年 | 87篇 |
1984年 | 38篇 |
1983年 | 30篇 |
1982年 | 32篇 |
1981年 | 21篇 |
1980年 | 21篇 |
1979年 | 30篇 |
1978年 | 24篇 |
1976年 | 22篇 |
1975年 | 28篇 |
1974年 | 19篇 |
1973年 | 21篇 |
排序方式: 共有3848条查询结果,搜索用时 15 毫秒
1.
2.
3.
P E Santos E Piontelli Y R Shea M L Galluzzo S M Holland M E Zelazko S D Rosenzweig 《Medical mycology》2006,44(8):749-753
Infections due to Penicillium species other than P.marneffei are rare. We identified a boy with X-linked chronic granulomatous disease (X-CGD) with a pulmonary nodule and adjacent rib osteomyelitis caused by Penicillium piceum. The only sign of infection was an elevated sedimentation rate. P. piceum was isolated by fine needle aspirate and from excised infected tissues. Surgical removal and one year of voriconazole treatment were very well tolerated and led to complete recovery. Microbiological, microscopic and molecular studies support the fungal diagnosis. P. piceum should be considered as a relevant pathogen in immunocompromised patients. 相似文献
4.
5.
PURPOSE: To examine longitudinal changes in mood and empathy over the course of the internal medicine residency. METHOD: The authors conducted a cohort study of 61 residents who completed the Profile of Mood States (POMS) and the Interpersonal Reactivity Index (IRI) at six time points during their internal medicine residency at a university-based program. (POMS was administered five times, and IRI was administered six times.) The main outcomes measured were trends in mood disturbances and multiple domains of empathy over the three-year residency, and comparisons to norms. RESULTS: Response rates varied from Time 1 to Time 6 (98%, 72%, 79%, 79%, 94%, and 95%, respectively). Interns had better scores on four POMS subscales: Depression-Dejection (p = .0031), Anger-Hostility (p < .0001), Fatigue-Inertia (p < .0001), and Vigor-Activity (p < .0001) compared with later administrations, especially midinternship. By the end of residency all POMS scores were returning towards baseline (effects sizes in the .20 s), but only depression was no longer significantly different. IRI scores showed the decline in Empathic Concern remained over residency whereas Personal Distress peaked midinternship year but approached baseline at the end of residency. Compared with the general population, the graduating residents were less tense, depressed, and confused. Personal Distress was significantly lower than the norm group. CONCLUSIONS: Internal medicine residency presents challenges resulting in common mood disturbances. Although graduating residents appear to be better off than the population norms, some domains of their mood disturbances and empathy never fully recover from their internship year. 相似文献
6.
7.
8.
Leonidas JC; Berdon WE; Valderrama E; Neveling U; Schuval S; Weiss SJ; Hilfer C; Godine L 《Radiology》1996,198(2):377
9.
JC Sitek† M Loeb‡ JR Ronnevig¶ 《Journal of the European Academy of Dermatology and Venereology》2007,21(7):891-896
BACKGROUND: Since 1997, a number of trials have shown promising results in treating generalized vitiligo with narrowband ultraviolet B (UVB) both in adults and children. However, there is little knowledge concerning the duration and permanency of the treatment-induced repigmentation. OBJECTIVE: Our main objective was to perform a follow-up trial of successfully treated patients receiving narrowband UVB for generalized vitiligo. METHODS: We have investigated to what degree the treatment-induced repigmentation remains stable for up to 2 years post-treatment. We performed an initial open trial including 31 patients with generalized vitiligo. They received narrowband UVB thrice weekly for up to 12 months. Patients experiencing > 75% repigmentation were defined responders and were included in the follow-up trial. Responders were followed every 6 months for up to 2 years after cessation of treatment. We observed the pigmentation status and registered any changes indicating loss of pigmentation and relapse. RESULTS: Eleven of the 31 treated patients were included in the follow-up trial. Six patients had relapse and five patients had stable response 24 months after cessation of treatment. Four out of six relapses were within 6 months post-treatment. CONCLUSION: In our study population of 31 patients with generalized vitiligo, five patients (16%) experienced > 75% stable repigmentation 2 years after cessation of a treatment programme of up to 1 years narrowband UVB therapy. 相似文献
10.
Ongoing pregnancies after intracytoplasmic injection using cryopreserved testicular spermatozoa 总被引:4,自引:2,他引:2
Perraguin-Jayot S; Audebert A; Emperaire JC; Parneix I 《Human reproduction (Oxford, England)》1997,12(12):2706-2709
We report two clinical pregnancies occurring after intracytoplasmic sperm
injection (ICSI) using cryopreserved spermatozoa obtained from testicular
biopsy, made in two different infertility situations in our clinic. The
first patient showed a secretory azoospermia associated with elevated serum
follicular stimulating hormone (FSH) level and spermiogenesis maturation
arrest. The second patient was affected by azoospermia resulting from
bilateral epididymal obstruction. Spermatozoa present in the wet
preparation of testicular biopsy made on the day of scrotal exploration
were cryopreserved within the testicular tissue for both men.
Intracytoplasmic injections were performed at a later date, using
spermatozoa prepared from frozen-thawed tissues. In each case, three
embryos were obtained and transferred in utero. The transfers resulted in a
twin pregnancy for the first case, and in a singleton pregnancy for the
second. Living foetuses were seen in the ultrasound scan at the 7th week
and both pregnancies are proceeding to date beyond 30 weeks without
complications.
相似文献